Disable warnings when generating GL wrappers

Bug: 15028495
Change-Id: Ic0c974e868d05632a06748c90cedbdd409ce2aa8
diff --git a/opengl/libs/GLES_CM/gl.cpp b/opengl/libs/GLES_CM/gl.cpp
index 893577b..e5de4a7 100644
--- a/opengl/libs/GLES_CM/gl.cpp
+++ b/opengl/libs/GLES_CM/gl.cpp
@@ -158,8 +158,10 @@
 
 
 extern "C" {
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #include "gl_api.in"
 #include "glext_api.in"
+#pragma GCC diagnostic warning "-Wunused-parameter"
 }
 
 #undef API_ENTRY