Native utils for working with user and app IDs.

Bug: 6925012
Change-Id: I56f18826fd324f60b6e446cebd30719258e40990
diff --git a/libcutils/Android.mk b/libcutils/Android.mk
index 5c227b6..6d525ba 100644
--- a/libcutils/Android.mk
+++ b/libcutils/Android.mk
@@ -50,7 +50,8 @@
 	threads.c \
 	sched_policy.c \
 	iosched_policy.c \
-	str_parms.c
+	str_parms.c \
+	multiuser.c
 
 commonHostSources := \
         ashmem-host.c