add drm/ directory to include it as part of frameworks

Change-Id: I62a6ab77587d88ea960f9ece17dcb75726e7e5a9
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 25de0ea..f204c76 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -83,6 +83,7 @@
 	    graphics \
 	    location \
 	    media \
+	    drm \
 	    opengl \
 	    sax \
 	    telephony \