Add annotation support lib.

Change-Id: I5a4ddbdf09a09db944e16ed6baab604aa1710974
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 5dfc543..1399724 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -105,6 +105,7 @@
 # A list of all source roots under frameworks/support.
 #
 FRAMEWORKS_SUPPORT_SUBDIRS := \
+        annotations \
         v4 \
         v7/gridlayout \
         v7/appcompat \