Fix one and hide the other warnings from core/jni

Most of the warnings are unused parameter from skia functions.

Change-Id: I9df57718d117c26b96163f751ccb056ca86ac072
diff --git a/core/jni/Android.mk b/core/jni/Android.mk
index 1958584..2e0acb1 100644
--- a/core/jni/Android.mk
+++ b/core/jni/Android.mk
@@ -4,6 +4,9 @@
 LOCAL_CFLAGS += -DHAVE_CONFIG_H -DKHTML_NO_EXCEPTIONS -DGKWQ_NO_JAVA
 LOCAL_CFLAGS += -DNO_SUPPORT_JS_BINDING -DQT_NO_WHEELEVENT -DKHTML_NO_XBL
 LOCAL_CFLAGS += -U__APPLE__
+LOCAL_CFLAGS += -Wno-unused-parameter -Wno-int-to-pointer-cast
+LOCAL_CFLAGS += -Wno-maybe-uninitialized -Wno-parentheses
+LOCAL_CPPFLAGS += -Wno-conversion-null
 
 ifeq ($(TARGET_ARCH), arm)
 	LOCAL_CFLAGS += -DPACKED="__attribute__ ((packed))"