[srock] setup_srock.sh "restart" option and iterative rebuild script for LLVM#2088

jtb20 wants to merge 2 commits intoROCm:aomp-devROCm/aomp:aomp-devfrom

jtb20:no-rsync-and-setup-restartjtb20/aomp:no-rsync-and-setup-restartCopy head branch name to clipboard