EGL platform no longer supports exporting symbols via `GLAD_GLAPI_EXPORT_BUILD`
It seems sometime between 0.1.33 and 0.1.35 the header block for `GLAD_GLAPI_EXPORT_BUILD` was removed from glad_egl.h and replaced with `#define GLAPI extern`. This breaks exporting symbols via `GLAD_GLAPI_EXPORT_BUILD`. 