refactor(profiles): use @{bin} and @{lib} in profiles (5)

apparmor.d/profiles-g-l/ipcalc

@@ -6,13 +6,13 @@ abi <abi/3.0>,
 
 include <tunables/global>
 
-@{exec_path} = /{usr/,}bin/ipcalc
+@{exec_path} = @{bin}/ipcalc
 profile ipcalc @{exec_path} {
   include <abstractions/base>
   include <abstractions/perl>
 
   @{exec_path} r,
-  /{usr/,}bin/perl r,
+  @{bin}/perl r,
 
   include if exists <local/ipcalc>
 }