snapcraft: add apparmor part (latest-edge) (canonical#533)

Let's ship newer version of AppArmor with support of new features. Only
needed for core22. But we will use with core24 based series for
consistency.

Also bumped apparmor to v4.0.2.


(cherry picked from commit 8591ed4)

snapcraft.yaml

@@ -1187,14 +1187,51 @@ parts:
       - bin/pzstd
       - bin/zstd
 
+  apparmor:
+    source: https://gitlab.com/apparmor/apparmor.git
+    source-commit: 84a6bc1b6dcdfeabb1ed3597f01e314f3bcee5c1 # v4.0.2
+    source-depth: 1
+    source-type: git
+    plugin: autotools
+    build-packages:
+      - g++
+      - bison
+      - flex
+      - autoconf-archive
+      - gettext
+    override-build: |-
+      set -ex
+
+      cd ./libraries/libapparmor
+      sh ./autogen.sh
+      sh ./configure --prefix=/
+      make
+      make install
+
+      cd ../../parser
+      make
+      make install
+
+      mkdir "${CRAFT_PART_INSTALL}/bin"
+      cp /sbin/apparmor_parser "${CRAFT_PART_INSTALL}/bin/"
+      mkdir "${CRAFT_PART_INSTALL}/lib"
+      cp /lib/libapparmor.so* "${CRAFT_PART_INSTALL}/lib/"
+
+      set +ex
+    prime:
+      - bin/apparmor_parser
+      - lib/libapparmor.so.1
+      - lib/libapparmor.so.1.*
+
   # Core components
   lxc:
+    after:
+      - apparmor
     source: https://github.com/lxc/lxc
     source-depth: 1
     source-type: git
     build-packages:
       - dpkg-dev
-      - libapparmor-dev
       - libcap-dev
       - libdbus-1-dev
       - libgnutls28-dev