Add API entry points for clipped kernels and fix Z-dimension clipping.

Change-Id: I43074cb8556d9b28d3e549930f5ac68387f8d823
diff --git a/rs.spec b/rs.spec
index 024497e..ddd85f4 100644
--- a/rs.spec
+++ b/rs.spec
@@ -319,6 +319,7 @@
     param RsAllocation ain
     param RsAllocation aout
     param const void * usr
+    param const RsScriptCall * sc
 }
 
 ScriptSetVarI {