remove conflicts/replaces on PKGBUILD

remove conflicts/replaces to see if its possible to install mesa-noegl/mesa-libgl-noegl/mesa-libgl/modified odroid-libgl all at the same time and if so what the result is !
Merge pull request #14 from hreikin/master

Merge master/mesa-noegl-devel
Update PKGBUILD

remove --enable-gallium-llvm
Merge pull request #16 from hreikin/devel

Devel
Merge pull request #18 from hreikin/devel

merge readme edits
Update PKGBUILD

remove --with-llvm-shared-libs \ to try get to build
Merge pull request #20 from hreikin/mesa-noegl-devel

merge changes in mesa noegl devel to devel