af5936f4aa
Previously we save the current commit hash before running lintstack. This is no problem for Jenkins but not very friendly if we run lintstack locally. Every time after it's done, git is in detached HEAD mode. This patch remembers the current branch name and automatically go back to the branch if available. Otherwise we fall back to the commit hash. Part of blueprint lintstack Change-Id: I145df3027022fc9a8302bc6da9ab300f677f3386