Add yuv headers

Change-Id: Ie7aa544b020c4f523201425c5c14cbe1e90eb77c
diff --git a/scriptc/rs_math.rsh b/scriptc/rs_math.rsh
index 8117ca8..73040b3 100644
--- a/scriptc/rs_math.rsh
+++ b/scriptc/rs_math.rsh
@@ -244,5 +244,8 @@
  */
 _RS_RUNTIME float4 rsUnpackColor8888(uchar4 c);
 
+_RS_RUNTIME uchar4 __attribute__((overloadable)) rsYuvToRGBA_uchar4(uchar y, uchar u, uchar v);
+_RS_RUNTIME float4 __attribute__((overloadable)) rsYuvToRGBA_float4(uchar y, uchar u, uchar v);
+
 
 #endif