package.bbclass: Ensure kernel modules get stripped

Kernel modules are not marked as executable but we do expect to strip them.
This patch adds in missing code to ensure we do this. Without this images
are getting sigificantly bloated in size.

(From OE-Core rev: 00b0a5f2f51bb3f88bbb9ae558c2859e3c1c406c)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/package.bbclass

@@ -870,6 +870,14 @@ python split_and_strip_files () {
 				elf_file = int(file_list[file][5:])
 				#bb.note("Strip %s" % file)
 				runstrip(file, elf_file, d)
+
+
+	if (d.getVar('INHIBIT_PACKAGE_STRIP', True) != '1'):	
+		for root, dirs, files in os.walk(dvar):
+			for f in files:
+				if not f.endswith(".ko"):
+					continue
+				runstrip(os.path.join(root, f), None, d)
 	#
 	# End of strip
 	#