Split platform functions from entrypoints

Test: Built, flashed, ran some GLES apps
Bug: 110883880
Change-Id: I8697002582c9ca4deea926c298c5e9ab7ac39580
diff --git a/opengl/libs/EGL/Loader.h b/opengl/libs/EGL/Loader.h
index 6a32bb3..93c33a8 100644
--- a/opengl/libs/EGL/Loader.h
+++ b/opengl/libs/EGL/Loader.h
@@ -33,7 +33,8 @@
     enum {
         EGL         = 0x01,
         GLESv1_CM   = 0x02,
-        GLESv2      = 0x04
+        GLESv2      = 0x04,
+        PLATFORM    = 0x08
     };
     struct driver_t {
         explicit driver_t(void* gles);