gearman 1.0.6 devel 1.1.12

@mickemcquaid mentioned earlier [here] (https://github.com/Homebrew/homebrew/pull/32255#issuecomment-55457036), but will elaborate.  This formula started pre-GA at 0.10; the GA series is currently 1.0.x, but was skipped in 7e3de84 (jumping from 0.3.9 to 1.1.5).  When I committed this update, I simply bumped from 1.1.9 to 1.1.12, but got failures on lion/mountain-lion and upon investigating realized this formula was following devel instead of GA.  You can see where gearman describes GA/devel [here] (https://launchpad.net/gearmand)