Introduce aliases and regex in submit_try.

Introduce aliases and regex in submit_try.

Adding the aliases 'compile' and 'cq'. Also adding a alias 'regex' that prompts the user for a regex, displays results and prompts again for confirmation.

Created to fix the feature request https://code.google.com/p/skia/issues/detail?id=1207 : replace hard-coded trybot lists with automated filtering.

(SkipBuildbotRuns)
Review URL: https://codereview.chromium.org/13493012

git-svn-id: http://skia.googlecode.com/svn/trunk@8569 2bbb7eff-a529-9590-31e7-b0007b416f81