Update BUILD.md
Update BUILD.md

Update BUILD.md to reflect correct location to get ROCm packages
ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL,ilangal-amd/CodeXL