<rdar://problem/13204647>

The SEL data formatter was working hard to ensure that pointers-to-selectors could be formatted by the same block of code. In that effort, we were taking the address-of a SEL.
This operation fails when the SEL lives in a register, and was causing problems.
The formatter has been fixed to work correctly without assuming &selector will be a valid object.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175227 91177308-0d34-0410-b5e6-96231b3b80d8