Simplify saveBundleOrTestRunFromBaseDirectory:
Simplify saveBundleOrTestRunFromBaseDirectory:

Summary: Each of these can call out to the relevant specific cases, rather than going through the "or" method. This localizes failure appropriately and ensures we get a more specific error message.

Reviewed By: zeyadsalloum

Differential Revision: D15352333

fbshipit-source-id: 883059fb6640e27ee5cd58293f0ca81497c66aa5

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl