sync: Fix split call on malformed email addresses

If an email address in a commit object contains a space, like a few
malformed ones on the Linux kernel, we still want to split only on
the first space.

Unfortunately my brain was too damaged by Perl and originally wrote
the split asking for 2 results; in Python split's argument is how
many splits to perform.  Here we want only 1 split, to break apart
the commit identity from the email address on the same line.

Signed-off-by: Shawn O. Pearce <sop@google.com>

project.py

@@ -728,7 +728,7 @@ class Project(object):
     last_mine = None
     cnt_mine = 0
     for commit in local_changes:
-      commit_id, committer_email = commit.split(' ', 2)
+      commit_id, committer_email = commit.split(' ', 1)
       if committer_email == self.UserEmail:
         last_mine = commit_id
         cnt_mine += 1