Adding anisotropic filtering and related samples.

Change-Id: Idb173274417feb5e25bfd64c5e9fa2492a23a17e
diff --git a/libs/rs/rs.spec b/libs/rs/rs.spec
index 2b7928f..a4752f4 100644
--- a/libs/rs/rs.spec
+++ b/libs/rs/rs.spec
@@ -288,6 +288,11 @@
 	param RsSamplerValue value
 	}
 
+SamplerSet2 {
+	param RsSamplerParam p
+	param float value
+	}
+
 SamplerCreate {
 	ret RsSampler
 	}