progs: Add missing EGL_RENDERABLE_TYPE for EGL demos.
The default value of EGL_RENDERABLE_TYPE is EGL_OPENGL_ES_BIT. The
proper values should be specified if we are not using OpenGL ES.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Since 5a459d58fca2b71cb77c39f98df8a81ce6298421, libEGL no longer links
to libX11. Add the dependency to affected progs and cleanup
prog/egl/Makefile.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>