lit: Show all output with --show-all, even in combination with --succinct

I missed an earlier exit for the --succinct case when I introduced the
-a option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252698 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed