Poort Man Themes: add messaging theme

Change-Id: I8d7a3a42f07db95e256f255b3c54ac5f2e2fad17
diff --git a/config/packages.mk b/config/packages.mk
index 2f50583..c7da9e0 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -63,6 +63,7 @@
     ContactsTheme \
     DocumentsUITheme \
     DialerTheme \
+    MessagesTheme \
     TelecommTheme \
     PhonographTheme