b=851964; Odin/OSX, part 1. add breakpad TARGET_OSX_USE_64BIT_EXCEPTIONS, and use it; r=ted
b=851964; Odin/OSX, part 2. add BreakpadUserExceptionHandler support to breakpad; r=ted
b=851964; Odin/OSX, part 3. enable AsmJS on OSX by using new Breakpad user handler, r=luke