Add commit-msg hook also for manifest project

The manifest project has - by design - not a review URL associated
with it. It is actually not even a 'project' in repo's sense.

This will prevent the commit-msg hook from being added, which is
not necessarily wanted as the project is managed in gerrit.

This commit will enable the commit-msg hook, which in turn will
add the Change-Id-line to every new commit in it. This simplifies
replacing patch sets (by git push ... refs/for/...).

Change-Id: I42d0f6fd79e6282d9d47074a3819e68d968999a7
Signed-off-by: Victor Boivie <victor.boivie@sonyericsson.com>

project.py

@@ -1484,10 +1484,13 @@ class Project(object):
     for stock_hook in _ProjectHooks():
       name = os.path.basename(stock_hook)
 
-      if name in ('commit-msg',) and not self.remote.review:
+      if name in ('commit-msg',) and not self.remote.review \
+            and not self is self.manifest.manifestProject:
         # Don't install a Gerrit Code Review hook if this
         # project does not appear to use it for reviews.
         #
+        # Since the manifest project is one of those, but also
+        # managed through gerrit, it's excluded
         continue
 
       dst = os.path.join(hooks, name)