egl: add support for EGL_ANDROID_blob_cache

v2: cleanup, move callbacks to _egl_display struct (Emil Velikov)
    adapt to earlier ctx->screen changes

v3: remove useless checking, add _eglSetFuncName (Emil Velikov)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> (v2)
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
6 files changed