merge libepoxy 1.5.4.

initial import of libepoxy-1.5.4

fix conditional to avoid redefinition.

merge and update for libepoxy 1.4.3.

merge libepoxy 1.4.3.

initial import of libepoxy-1.4.3

on NetBSD, don't define PLATFORM_HAS_EGL if it is already defined

- enable EGL on x86/arm64 (XXX also do evbarm32)
- enable gbm/glamor in the server.

play nice with lint

use libfoo.so not libfoo.so.x on netbsd. from prlw1.

turn off egl for now (we need to enable the mesa parts). add the
python generated parts. add a configure so that pkgconfig stuff
works properly.

initial import of libepoxy-1.3.1