constify JNINativeMethod function pointer tables

Change-Id: I4036c924958221cbc644724f8eb01c5de3cd7954
diff --git a/core/jni/android_opengl_GLES31.cpp b/core/jni/android_opengl_GLES31.cpp
index 92ecbe0..e427388 100644
--- a/core/jni/android_opengl_GLES31.cpp
+++ b/core/jni/android_opengl_GLES31.cpp
@@ -3175,7 +3175,7 @@
 
 static const char *classPathName = "android/opengl/GLES31";
 
-static JNINativeMethod methods[] = {
+static const JNINativeMethod methods[] = {
 {"_nativeClassInit", "()V", (void*)nativeClassInit },
 {"glDispatchCompute", "(III)V", (void *) android_glDispatchCompute__III },
 {"glDispatchComputeIndirect", "(J)V", (void *) android_glDispatchComputeIndirect },