Stubs of android-support-multidex-instrumentation.

For the SDK.

Change-Id: I54bee4d89d7c291933673c3b5bf7f2b85f904377
diff --git a/core/pathmap.mk b/core/pathmap.mk
index ed50758..83202a4 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -110,7 +110,8 @@
         v7/appcompat \
         v7/mediarouter \
         v13 \
-        multidex
+        multidex \
+        multidex/instrumentation
 
 #
 # A version of FRAMEWORKS_SUPPORT_SUBDIRS that is expanded to full paths from