ignition-gui1: use newer commit and build bottle (#531)
ignition-gui1: use newer commit and build bottle (#531)

* ignition-gui1: use newer commit and build bottle

* ignition-gui1: depend on tinyxml2@6.2.0

* ignition-gui1: fix test

* ignition-gui1: update 1.0.0~pre2~1~ fae7d4b bottle.

osrf/homebrew-simulation,j-rivero/homebrew-simulation,scpeters/homebrew-simulation