powerpc test in ubuntu_kernel_selftest on Trusty will collide with the TARGETS variable

[Po-Hsu Lin]

Subtests in the powerpc directory were defined with:
    TARGETS = pmu tm

However, this TARGETS here will get overrided if we run those tests in ubuntu_kernel_selftests with (this is the recommended way):
   $ make -C tools/testing/selftests TARGETS=ptrace run_tests

So the test will failed with:
  make: Entering directory `/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
  for TARGET in powerpc; do \
    make -C $TARGET; \
   done;
  make[1]: Entering directory `/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/powerpc'
  make: Entering an unknown directory
  make: Leaving an unknown directory
  make[1]: Leaving directory `/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/powerpc'
  make: Leaving directory `/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
  stderr:
  make: *** powerpc: No such file or directory. Stop.

This issue had been addressed upstream, with commit a908f5de3b10d1a6

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-164-generic 3.13.0-164.214
ProcVersionSignature: User Name 3.13.0-164.214-generic 3.13.11-ckt39
Uname: Linux 3.13.0-164-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Dec 21 09:16 seq
 crw-rw---- 1 root audio 116, 33 Dec 21 09:16 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDmesg:

Date: Fri Dec 21 09:43:10 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:

ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-164-generic root=UUID=f941f548-6536-45e1-86fd-3b2699e0aaf6 ro console=ttyS0,115200n8
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-164-generic N/A
 linux-backports-modules-3.13.0-164-generic N/A
 linux-firmware 1.127.24
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-xenial
dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-xenial
dmi.sys.vendor: QEMU

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Po-Hsu Lin (cypressyew)]

This is affecting Trusty kernel.
In Xenial this has been modified to SUB_DIRS.

I will call this as a won't fix, since Trusty is now in ESM.