DEVELOPERS: add mksh/ruby to Waldemar Brodkorb

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2685,6 +2685,8 @@ N:	Wade Berrier <wberrier@gmail.com>
 F:	package/ngrep/
 
 N:	Waldemar Brodkorb <wbx@openadk.org>
+F:	package/mksh/
+F:	package/ruby/
 F:	package/uclibc/
 F:	package/uclibc-ng-test/