Disable warnings when generating GL wrappers

Bug: 15028495
Change-Id: Ic0c974e868d05632a06748c90cedbdd409ce2aa8
diff --git a/opengl/libs/GLES2/gl2.cpp b/opengl/libs/GLES2/gl2.cpp
index dea5b75..fa8a228 100644
--- a/opengl/libs/GLES2/gl2.cpp
+++ b/opengl/libs/GLES2/gl2.cpp
@@ -107,8 +107,10 @@
 
 
 extern "C" {
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #include "gl2_api.in"
 #include "gl2ext_api.in"
+#pragma GCC diagnostic warning "-Wunused-parameter"
 }
 
 #undef API_ENTRY