re2c: update to 2.0.3
re2c: update to 2.0.3

Also add '--enable-golang' option to configure script.
waterlan/MSYS2-packages,Alexpux/MSYS2-packages,atom2013/MSYS2-packages,Alexpux/MSYS2-packages,mati865/MSYS2-packages,JPeterMugaas/MSYS2-packages,juergenpf/MSYS2-packages,Alexpux/MSYS2-packages,mati865/MSYS2-packages,mati865/MSYS2-packages,waterlan/MSYS2-packages,juergenpf/MSYS2-packages,atom2013/MSYS2-packages,mati865/MSYS2-packages,waterlan/MSYS2-packages,JPeterMugaas/MSYS2-packages,waterlan/MSYS2-packages,atom2013/MSYS2-packages,atom2013/MSYS2-packages,juergenpf/MSYS2-packages,JPeterMugaas/MSYS2-packages,JPeterMugaas/MSYS2-packages,juergenpf/MSYS2-packages,juergenpf/MSYS2-packages,Alexpux/MSYS2-packages