meson: incomplete 'make help'

[Philippe Mathieu-Daudé]

Since the meson switch, 'make help' doesn't list various targets.

Diff before/after:

---
 Generic targets:
   all - Build all
   dir/file.o - Build specified target only
   install - Install QEMU
   ctags/TAGS - Generate tags file for editors
   cscope - Generate cscope index
-
-Architecture specific targets:
- aarch64-softmmu/all - Build for aarch64-softmmu
- alpha-softmmu/all - Build for alpha-softmmu
- arm-softmmu/all - Build for arm-softmmu
- avr-softmmu/all - Build for avr-softmmu
- cris-softmmu/all - Build for cris-softmmu
- hppa-softmmu/all - Build for hppa-softmmu
- i386-softmmu/all - Build for i386-softmmu
- lm32-softmmu/all - Build for lm32-softmmu
- m68k-softmmu/all - Build for m68k-softmmu
- microblazeel-softmmu/all - Build for microblazeel-softmmu
- microblaze-softmmu/all - Build for microblaze-softmmu
- mips64el-softmmu/all - Build for mips64el-softmmu
- mips64-softmmu/all - Build for mips64-softmmu
- mipsel-softmmu/all - Build for mipsel-softmmu
- mips-softmmu/all - Build for mips-softmmu
- moxie-softmmu/all - Build for moxie-softmmu
- nios2-softmmu/all - Build for nios2-softmmu
- or1k-softmmu/all - Build for or1k-softmmu
- ppc64-softmmu/all - Build for ppc64-softmmu
- ppc-softmmu/all - Build for ppc-softmmu
- riscv32-softmmu/all - Build for riscv32-softmmu
- riscv64-softmmu/all - Build for riscv64-softmmu
- rx-softmmu/all - Build for rx-softmmu
- s390x-softmmu/all - Build for s390x-softmmu
- sh4eb-softmmu/all - Build for sh4eb-softmmu
- sh4-softmmu/all - Build for sh4-softmmu
- sparc64-softmmu/all - Build for sparc64-softmmu
- sparc-softmmu/all - Build for sparc-softmmu
- tricore-softmmu/all - Build for tricore-softmmu
- unicore32-softmmu/all - Build for unicore32-softmmu
- x86_64-softmmu/all - Build for x86_64-softmmu
- xtensaeb-softmmu/all - Build for xtensaeb-softmmu
- xtensa-softmmu/all - Build for xtensa-softmmu
- aarch64_be-linux-user/all - Build for aarch64_be-linux-user
- aarch64-linux-user/all - Build for aarch64-linux-user
- alpha-linux-user/all - Build for alpha-linux-user
- armeb-linux-user/all - Build for armeb-linux-user
- arm-linux-user/all - Build for arm-linux-user
- cris-linux-user/all - Build for cris-linux-user
- hppa-linux-user/all - Build for hppa-linux-user
- i386-linux-user/all - Build for i386-linux-user
- m68k-linux-user/all - Build for m68k-linux-user
- microblazeel-linux-user/all - Build for microblazeel-linux-user
- microblaze-linux-user/all - Build for microblaze-linux-user
- mips64el-linux-user/all - Build for mips64el-linux-user
- mips64-linux-user/all - Build for mips64-linux-user
- mipsel-linux-user/all - Build for mipsel-linux-user
- mips-linux-user/all - Build for mips-linux-user
- mipsn32el-linux-user/all - Build for mipsn32el-linux-user
- mipsn32-linux-user/all - Build for mipsn32-linux-user
- nios2-linux-user/all - Build for nios2-linux-user
- or1k-linux-user/all - Build for or1k-linux-user
- ppc64abi32-linux-user/all - Build for ppc64abi32-linux-user
- ppc64le-linux-user/all - Build for ppc64le-linux-user
- ppc64-linux-user/all - Build for ppc64-linux-user
- ppc-linux-user/all - Build for ppc-linux-user
- riscv32-linux-user/all - Build for riscv32-linux-user
- riscv64-linux-user/all - Build for riscv64-linux-user
- s390x-linux-user/all - Build for s390x-linux-user
- sh4eb-linux-user/all - Build for sh4eb-linux-user
- sh4-linux-user/all - Build for sh4-linux-user
- sparc32plus-linux-user/all - Build for sparc32plus-linux-user
- sparc64-linux-user/all - Build for sparc64-linux-user
- sparc-linux-user/all - Build for sparc-linux-user
- tilegx-linux-user/all - Build for tilegx-linux-user
- x86_64-linux-user/all - Build for x86_64-linux-user
- xtensaeb-linux-user/all - Build for xtensaeb-linux-user
- xtensa-linux-user/all - Build for xtensa-linux-user
-
-Helper targets:
- fsdev/virtfs-proxy-helper - Build virtfs-proxy-helper
- scsi/qemu-pr-helper - Build qemu-pr-helper
- qemu-bridge-helper - Build qemu-bridge-helper
- vhost-user-gpu - Build vhost-user-gpu
- virtiofsd - Build virtiofsd
-
-Tools targets:
- qemu-ga - Build qemu-ga tool
- qemu-keymap - Build qemu-keymap tool
- elf2dmp - Build elf2dmp tool
- ivshmem-client - Build ivshmem-client tool
- ivshmem-server - Build ivshmem-server tool
- qemu-nbd - Build qemu-nbd tool
- qemu-storage-daemon - Build qemu-storage-daemon tool
- qemu-img - Build qemu-img tool
- qemu-io - Build qemu-io tool
- qemu-edid - Build qemu-edid tool
+ sparse - Run sparse on the QEMU source

 Cleaning targets:
   clean - Remove most generated files but keep
the config
@@ -105,7 +20,7 @@
   vm-help - Help about targets running tests
inside VM

 Documentation targets:
- html info pdf txt - Build documentation in specified format
+ html info pdf txt man - Build documentation in specified format

   make [targets] - (quiet build, default)
   make V=1 [targets] - (verbose build)
---

[Philippe Mathieu-Daudé (philmd)]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'invalid' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/227