Revert "gcc: Rebuild for isl 0.23"
Revert "gcc: Rebuild for isl 0.23"

This reverts commit 89f90c377886ea8a46319e22da47cd8fc7a3abb3.

Alexpux/MSYS2-packages,Alexpux/MSYS2-packages,atom2013/MSYS2-packages,atom2013/MSYS2-packages,Alexpux/MSYS2-packages,waterlan/MSYS2-packages,Alexpux/MSYS2-packages,mati865/MSYS2-packages,waterlan/MSYS2-packages,waterlan/MSYS2-packages,waterlan/MSYS2-packages,atom2013/MSYS2-packages,JPeterMugaas/MSYS2-packages,mati865/MSYS2-packages,JPeterMugaas/MSYS2-packages,atom2013/MSYS2-packages,mati865/MSYS2-packages,mati865/MSYS2-packages,JPeterMugaas/MSYS2-packages,JPeterMugaas/MSYS2-packages