Use Gestalt to get number of CPUs on OS X.

MPProcessors has been deprecated with 10.7. When targeting 10.7 (required when
building with Qt 5.6 on OS X) this causes a warning. Use Gestalt instead
(Gestalt has been deprecated with 10.8, but when targeting 10.7 this doesn't
cause a warning, and Gestalt is used for other values as well).

Change-Id: Iaf82147ad47115e228f5c08f8198a6a7e92102a3
1 file changed