CI: Add initramfs inspection test

.ci/integration.sh

@@ -112,6 +112,12 @@ bump_autobuild() {
 	fi
 }
 
+inspect_initramfs() {
+	pmbootstrap initfs
+	pmbootstrap initfs ls
+	pmbootstrap initfs extract
+}
+
 # Run the test
 echo "Running $test $*"
 "$test" "$@"

.ci/integration_tests/inspect_initramfs

@@ -0,0 +1 @@
+../integration.sh

.gitlab-ci.yml

@@ -282,3 +282,8 @@ pkgrel_bump amd64:
   extends: .integration
   script:
     - .ci/integration_tests/bump_autobuild qemu-amd64 hello-world
+
+inspect initramfs:
+  extends: .integration
+  script:
+    - .ci/integration_tests/inspect_initramfs