Switch to OS X 10.7 SDK everywhere in our OS X descriptors
We should get rid of our 10.6 SDK as Tor Browser based on ESR 52 will have 10.9 as the minimum requirement. Building with the 10.7 SDK is sufficient in that case.
We should get rid of our 10.6 SDK as Tor Browser based on ESR 52 will have 10.9 as the minimum requirement. Building with the 10.7 SDK is sufficient in that case.