make initramfs dep8 test work both on debian/ubuntu

[Mitchell Dzurick]

During the noble merge cycle, 2 deltas were made so the initramfs test works on both debian/ubuntu:

diff --git a/debian/tests/control b/debian/tests/control
index 42eab9e..81901cb 100644
--- a/debian/tests/control
+++ b/debian/tests/control
@@ -19,6 +19,6 @@ Architecture: amd64 arm64
 Depends:
  multipath-tools,
  multipath-tools-boot,
- linux-image-amd64 | linux-image-arm64,
+ linux-image-generic,
  initramfs-tools,
 Restrictions: needs-root, allow-stderr
diff --git a/debian/tests/initramfs b/debian/tests/initramfs
index 8c284ce..6e107c3 100755
--- a/debian/tests/initramfs
+++ b/debian/tests/initramfs
@@ -29,4 +29,4 @@ find_file '*-del-part-nodes.rules'
 find_file '*-kpartx.rules'

 echo "check multipath binary is executable"
-chroot initramfs /usr/sbin/multipath -h
+chroot initramfs/main /usr/sbin/multipath -h

It'd be nice to get the test working both on debian/ubuntu so we can drop the delta going forward.