meson: reorder lib and common subdir

So that lib can depend on the new library from common.

meson.build

@@ -141,12 +141,12 @@ config_h = configure_file(
 )
 config_h_dir = include_directories('.')
 
-# Library is always required
-subdir('lib')
-
 # common lib is always required
 subdir('common')
 
+# Library is always required
+subdir('lib')
+
 # Utilities are always required except when having both 64 and 32 bit versions
 # of libgamemode installed
 if with_util == true