add LICENSE to the distribution
add LICENSE to the distribution

Reported-by: Richard Biener <6d8e366a4141f30a896395488f2e936a4b17b79f@suse.de>
Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

pierrotdelalune/isl,serge-sans-paille/isl,inducer/isl-mirror,epowers/isl,BobSaget-Mod/libisl,UBERTC/isl,epowers/isl,PollyLabs/isl,jleben/isl,KangDroidSMProject/ISL,abduld/isl,cfx-next/toolchain_isl-upstream,UBERTC/isl,serge-sans-paille/isl,Meinersbur/isl,crossbuild/isl,cfx-next/toolchain_isl-upstream,Distrotech/isl,VanirLLVM/toolchain_isl,BobSaget-Mod/libisl,inducer/isl-mirror,evaautomation/isl,KangDroidSMProject/ISL,PollyLabs/isl,BenzoSM/isl,Distrotech/isl,evaautomation/isl,UBERTC/isl,cfx-next/toolchain_isl-upstream,pierrotdelalune/isl,UBERTC/isl,PollyLabs/isl,simbuerg/isl,BobSaget-Mod/libisl,tobig/isl,jleben/isl,BenzoSM/isl,cfx-next/toolchain_isl-upstream,VanirLLVM/toolchain_isl,nicolasvasilache/isl,serge-sans-paille/isl,simbuerg/isl,inducer/isl-mirror,evaautomation/isl,BobSaget-Mod/libisl,nicolasvasilache/isl,nicolasvasilache/isl,BenzoSM/isl,abduld/isl,crossbuild/isl,Meinersbur/isl,KangDroidSMProject/ISL,SaberMod/isl-current,simbuerg/isl,abduld/isl,Distrotech/isl,tobig/isl,SaberMod/isl-current,epowers/isl,KangDroidSMProject/ISL,simbuerg/isl,pierrotdelalune/isl,inducer/isl-mirror,inducer/isl-mirror,pierrotdelalune/isl,serge-sans-paille/isl,crossbuild/isl,Distrotech/isl,pierrotdelalune/isl,jleben/isl,abduld/isl,VanirLLVM/toolchain_isl,tobig/isl,SaberMod/isl-current,simbuerg/isl,PollyLabs/isl,epowers/isl,VanirLLVM/toolchain_isl,evaautomation/isl,tobig/isl,BenzoSM/isl,Meinersbur/isl,Meinersbur/isl,nicolasvasilache/isl,VanirLLVM/toolchain_isl,BobSaget-Mod/libisl,KangDroidSMProject/ISL,jleben/isl,jleben/isl,cfx-next/toolchain_isl-upstream,crossbuild/isl,SaberMod/isl-current,nicolasvasilache/isl,BenzoSM/isl,PollyLabs/isl,Distrotech/isl,serge-sans-paille/isl,epowers/isl