Rename the source of core-utils module to core-utils

Change-Id: Ia2db5386ca0048ed70a310a9b13e074d2fedd0a7
(cherry picked from commit 73b833b6a5d9b03c460ec61c5d781c032d6dbe1f)
diff --git a/core/pathmap.mk b/core/pathmap.mk
index d77f053..edc584b 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -110,7 +110,7 @@
         media-compat \
         fragment \
         core-ui \
-        v4 \
+        core-utils \
         v7/gridlayout \
         v7/cardview \
         v7/mediarouter \