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.

llvm-svn: 252698

llvm/utils/lit/lit/main.py

@@ -43,6 +43,7 @@ class TestingProgressDisplay(object):
                                     test.getFullName())
 
         shouldShow = test.result.code.isFailure or \
+            self.opts.showAllOutput or \
             (not self.opts.quiet and not self.opts.succinct)
         if not shouldShow:
             return