CTS: Suppress -Wunused-parameter

Suppress unused-parameter warnings to lower build-time spam.

Bug: 18632512
Test: mmma cts
Change-Id: I2af0a9b0009e91415f87a397611d716567fbb16b
diff --git a/tests/cts/net/jni/Android.mk b/tests/cts/net/jni/Android.mk
index 0ec8d28..887e95e 100644
--- a/tests/cts/net/jni/Android.mk
+++ b/tests/cts/net/jni/Android.mk
@@ -27,6 +27,9 @@
 
 LOCAL_SHARED_LIBRARIES := libnativehelper_compat_libc++ liblog
 LOCAL_CXX_STL := libc++_static
+
+LOCAL_CFLAGS := -Wno-unused-parameter
+
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)