pacstrap: move include_m4 after the globals

After the m4 substitution, the globals end up mixed misc functions.
Just keep them at the top for legibility.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

pacstrap.in

@@ -10,8 +10,6 @@
 
 shopt -s extglob
 
-m4_include(common)
-
 hostcache=0
 copykeyring=1
 initkeyring=0
@@ -23,6 +21,8 @@ unshare=0
 copyconf=0
 pacman_config=/etc/pacman.conf
 
+m4_include(common)
+
 usage() {
   cat <<EOF
 usage: ${0##*/} [options] root [packages...]