Add -dot flag to test-release.sh

This is meant to be used when testing dot releases e.g.:

./test-release -release 3.3 -dot 1 -rc 1

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@190581 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed