Fix loman breakage.

Pass cwd into FindRepoDir().

BUG=None
TEST=None

Change-Id: Ib0e68e93a24bbdd57bd2090be112f629673bca6a
Reviewed-on: https://gerrit.chromium.org/gerrit/40091
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Commit-Queue: Ryan Cui <rcui@chromium.org>
Tested-by: Ryan Cui <rcui@chromium.org>
diff --git a/scripts/loman.py b/scripts/loman.py
index 4f3ad8b..701aa4c 100644
--- a/scripts/loman.py
+++ b/scripts/loman.py
@@ -158,7 +158,7 @@
                     "checkout utilizing manifest groups.")
   (options, args) = parser.parse_args(argv)
 
-  repo_dir = git.FindRepoDir()
+  repo_dir = git.FindRepoDir(os.getcwd())
   if not repo_dir:
     parser.error("This script must be invoked from within a repository "
                  "checkout.")