cml1.bbclass: Return sorted list of cfg files

Since these files are passed to merge_config.sh its better to use a
sorted list, so we can be sure that this list is always fed in same
order irrespective of python versions on host

(From OE-Core rev: 3d949f286c29bcaaf4dfc0aaffd15f129d1bab2d)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/cml1.bbclass

@@ -6,7 +6,7 @@ def find_cfgs(d):
         if s.endswith('.cfg'):
             sources_list.append(s)
 
-    return sources_list
+    return sorted(sources_list)
 
 cml1_do_configure() {
 	set -e