First pass at implementing the Grass live wallpaper in RenderScript.

This change also adds second(), minute() and hour() to the RS library.
diff --git a/libs/rs/rsScriptC.cpp b/libs/rs/rsScriptC.cpp
index 842c836..3b9d27a 100644
--- a/libs/rs/rsScriptC.cpp
+++ b/libs/rs/rsScriptC.cpp
@@ -230,6 +230,12 @@
     ss->mEnviroment.mClearColor[3] = a;
 }
 
+void rsi_ScriptCSetTimeZone(Context * rsc, const char * timeZone, uint32_t length)
+{
+    ScriptCState *ss = &rsc->mScriptC;
+    ss->mEnviroment.mTimeZone = timeZone;
+}
+
 void rsi_ScriptCSetClearDepth(Context * rsc, float v)
 {
     ScriptCState *ss = &rsc->mScriptC;