feat(profile): use the new @{tmp} variable.

It is only used with the owner statement.

apparmor.d/profiles-a-f/frontend

@@ -74,7 +74,7 @@ profile frontend @{exec_path} flags=(complain) {
   /etc/inputrc r,
   /etc/shadow r,
 
-  owner /tmp/file* w,
+  owner @{tmp}/file* w,
   owner /var/cache/debconf/* rwk,
 
   @{HOME}/.Xauthority r,
@@ -119,7 +119,7 @@ profile frontend @{exec_path} flags=(complain) {
     @{run}/         r,
     @{run}/**       rw,
           /tmp/     r,
-    owner /tmp/**   rw,
+    owner @{tmp}/**   rw,
 
   }