Simplify the CreateFunctionEntryUnwindPlan () and CreateDefaultUnwindPlan()
methods in the ABIs.  Specify the register numbering of the UnwindPlan
we're creating and use those only register numbers.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@189074 91177308-0d34-0410-b5e6-96231b3b80d8
Fix ABIMacOSX_arm::RegisterIsVolatile() so it identifies r12 as a volatile reg.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@189077 91177308-0d34-0410-b5e6-96231b3b80d8