Revert "mesa: Build EGL without X11 headers after interop patchset"
Revert "mesa: Build EGL without X11 headers after interop patchset"

This reverts commit 4e2c9a04354b6b133845b8b93c0c5d34261a91d0.

The solution was incomplete and fragile. An alternative one is coming
shortly.

Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>
Tested-by: Tom Stellard <85590917cb30a670bf23f5b4273617f8815d1e87@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler