egl/dri2: load libglapi.0.dylib on osx

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90903
Signed-off-by: Julien Isorce <j.isorce@samsung.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>

src/egl/drivers/dri2/egl_dri2.c

@@ -2368,6 +2368,8 @@ dri2_load(_EGLDriver *drv)
 #ifdef HAVE_SHARED_GLAPI
 #ifdef HAVE_ANDROID_PLATFORM
    const char *libname = "libglapi.so";
+#elif defined(__APPLE__)
+   const char *libname = "libglapi.0.dylib";
 #else
    const char *libname = "libglapi.so.0";
 #endif