[LLDB][ppc64le] Rename enums in AuxVector

Summary:
On linux on ppc64le some of the enums in AuxVector have the same name
as macros defined in the system.

Reviewers: mikesart, labath

Reviewed By: labath

Subscribers: joerg, gut, krytarowski, lldb-commits

Differential Revision: https://reviews.llvm.org/D35065
Patch by Bruno Rosa <bruno.rosa@eldorado.org.br>

llvm-svn: 307632