Revert "* failed attempt to make core profile rendering"

This reverts commit 9c4337ddfbb0e1e6f139137d0b801957f172c76a.
- remove GLEW from linked libraries
* basic working version of core profile rendering

it's a partial revert of https://github.com/coelckers/gzdoom/commit/a8e9c1832f371853f2698d2ab82bcdddd61a79cf