refactor(profiles): use @{bin} and @{lib} in profiles (2)

apparmor.d/groups/freedesktop/xdg-screensaver

@@ -6,30 +6,30 @@ abi <abi/3.0>,
 
 include <tunables/global>
 
-@{exec_path} = /{usr/,}bin/xdg-screensaver
+@{exec_path} = @{bin}/xdg-screensaver
 profile xdg-screensaver @{exec_path} {
   include <abstractions/base>
   include <abstractions/consoles>
 
   @{exec_path} r,
 
-  /{usr/,}bin/             r,
+  @{bin}/             r,
 
-  /{usr/,}bin/{,ba,da}sh   rix,
-  /{usr/,}bin/mv           rix,
-  /{usr/,}bin/{,e}grep     rix,
-  /{usr/,}bin/sed          rix,
-  /{usr/,}bin/which{,.debianutils}        rix,
-  /{usr/,}bin/cat          rix,
-  /{usr/,}bin/uname        rix,
+  @{bin}/{,ba,da}sh   rix,
+  @{bin}/mv           rix,
+  @{bin}/{,e}grep     rix,
+  @{bin}/sed          rix,
+  @{bin}/which{,.debianutils}        rix,
+  @{bin}/cat          rix,
+  @{bin}/uname        rix,
 
-  /{usr/,}bin/xautolock    rix,
-  /{usr/,}bin/dbus-send    rix,
+  @{bin}/xautolock    rix,
+  @{bin}/dbus-send    rix,
 
-  /{usr/,}bin/xprop        rPx,
-  /{usr/,}bin/xdg-mime     rPx,
-  /{usr/,}bin/xset         rPx,
-  /{usr/,}bin/hostname     rix,
+  @{bin}/xprop        rPx,
+  @{bin}/xdg-mime     rPx,
+  @{bin}/xset         rPx,
+  @{bin}/hostname     rix,
 
   /dev/dri/card[0-9] rw,