Include LAND_DEST_BRANCH when generating a .reviewboardrc in setup-repo.

Review Request #6902 — Created Feb. 4, 2015 and submitted — Latest diff uploaded

Information

RBTools
release-0.7.x
f7a7f06...

Reviewers

The setup-repo command now includes the LAND_DEST_BRANCH option when
generating a new .reviewboardrc, if we can detect the branch. This is
one less step needed for new users who are trying to get going with
RBTools.

Ran rbt setup-repo in a tree. Saw it generated a configuration file
containing LAND_DEST_BRANCH and pointing to the correct value.