Clean up the coding conventions in UnwindAssembly-x86.cpp a little bit.
I wrote this originally as a part of an unwind library that was using
a different coding convention and some of that old style remained after
its integration into lldb.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@216419 91177308-0d34-0410-b5e6-96231b3b80d8