Update setup.py
Update setup.py

Pin gflags to 2.0 to fix build, while adding Python2.7 support is in progress.
selfcommit/simian,googlearchive/simian,sillywilly42/simian,frlen/simian,selfcommit/simian,frlen/simian,frlen/simian,googlearchive/simian,googlearchive/simian,sillywilly42/simian,googlearchive/simian,sillywilly42/simian,frlen/simian,selfcommit/simian,sillywilly42/simian,selfcommit/simian