simbody: test and replace Xcode paths (#678)
simbody: test and replace Xcode paths (#678)

* simbody: test for xcode paths

* simbody: inreplace Xcode paths with portable paths

* don't require inreplace to make a change

* simbody: update no xcode paths in bottle bottle.

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