Add two missing ARM cpusubtypes to the switch statement in 
MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType) .

Upcoming changes will cause existing test cases to use this but
I wanted to check in this obvious change separately.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215150 91177308-0d34-0410-b5e6-96231b3b80d8