Specify SDK version for RS graphics tests.

Change-Id: Ia61c753392432b91f91260a9b8769dfd396c259f
diff --git a/tests/RenderScriptTests/PerfTest/Android.mk b/tests/RenderScriptTests/PerfTest/Android.mk
index 0d1e7d2..e9ee771 100644
--- a/tests/RenderScriptTests/PerfTest/Android.mk
+++ b/tests/RenderScriptTests/PerfTest/Android.mk
@@ -24,6 +24,8 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-renderscript-files-under, src)
 #LOCAL_STATIC_JAVA_LIBRARIES := android.renderscript
 
+LOCAL_SDK_VERSION := 17
+
 LOCAL_PACKAGE_NAME := PerfTest
 
 include $(BUILD_PACKAGE)