only consider versioned kernel packages in autoremove

Metapackages like "linux-image-amd64" are otherwise matched by our
extraction as well, which later on can't be successfully compared via
dpkg --compare-versions as the 'amd64' bit isn't a version number.
(Luckily none of our architectures starts with a digit.)

This was broken by me in 0.9.16 as I moved a shell-glob matcher to a
regex-based one which has slightly different semantics regarding '*'.

Closes: 741962

debian/apt.auto-removal.sh

@@ -41,7 +41,7 @@ version_test_gt ()
 	return "$?"
 }
 
-list="$(${DPKG} -l | awk '/^ii[ ]+(linux|kfreebsd|gnumach)-image-[0-9]*/ && $2 !~ /-dbg$/ { print $2 }' | sed -e 's#\(linux\|kfreebsd\|gnumach\)-image-##')"
+list="$(${DPKG} -l | awk '/^ii[ ]+(linux|kfreebsd|gnumach)-image-[0-9]/ && $2 !~ /-dbg$/ { print $2 }' | sed -e 's#\(linux\|kfreebsd\|gnumach\)-image-##')"
 
 latest_version=""
 previous_version=""

test/integration/test-kernel-helper-autoremove

@@ -20,6 +20,7 @@ CURRENTKERNEL="linux-image-$(uname -r)"
 insertinstalledpackage "$CURRENTKERNEL" 'amd64' '1'
 insertinstalledpackage 'linux-image-1.0.0-2-generic' 'amd64' '1.0.0-2'
 insertinstalledpackage 'linux-image-100.0.0-1-generic' 'amd64' '100.0.0-1'
+insertinstalledpackage 'linux-image-amd64' 'amd64' '100.0.0-1'
 # ensure that the '.' is really a dot and not a wildcard
 insertinstalledpackage 'linux-headers-1000000-1-generic' 'amd64' '100.0.0-1'