Add RenderScript category for atrace.

Change-Id: I069a301329f4a579c7b2716fa52c3f4a0ae0062b
diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 1911839..6d6f77e 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -82,6 +82,7 @@
     { "hal",        "Hardware Modules", ATRACE_TAG_HAL, { } },
     { "res",        "Resource Loading", ATRACE_TAG_RESOURCES, { } },
     { "dalvik",     "Dalvik VM",        ATRACE_TAG_DALVIK, { } },
+    { "rs",         "RenderScript",     ATRACE_TAG_RS, { } },
     { "sched",      "CPU Scheduling",   0, {
         { REQ,      "/sys/kernel/debug/tracing/events/sched/sched_switch/enable" },
         { REQ,      "/sys/kernel/debug/tracing/events/sched/sched_wakeup/enable" },