Add short options for git cl presubmit
Add short options for git cl presubmit

Adding -u and -f as short options for --upload and --force.
There is precedent for these short options elsewhere in
git_cl.py

TBR=maruel@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11783007

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@175310 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools