Add ATRACE_TAG_RS.

Change-Id: Iaff497a1cb04a797441b5bb47b30ad6f09db8e95
diff --git a/include/cutils/trace.h b/include/cutils/trace.h
index 29034ca..fbb6077 100644
--- a/include/cutils/trace.h
+++ b/include/cutils/trace.h
@@ -66,7 +66,8 @@
 #define ATRACE_TAG_APP              (1<<12)
 #define ATRACE_TAG_RESOURCES        (1<<13)
 #define ATRACE_TAG_DALVIK           (1<<14)
-#define ATRACE_TAG_LAST             ATRACE_TAG_DALVIK
+#define ATRACE_TAG_RS               (1<<15)
+#define ATRACE_TAG_LAST             ATRACE_TAG_RS
 
 // Reserved for initialization.
 #define ATRACE_TAG_NOT_READY        (1LL<<63)