Todd points out that my change to ProcessElfCore is probably
not going to key off of the ELF object file like I'd intended.
Revert my change in r203205; also revert Greg's change in
r203107 which builds ProcessElfCore on non-Linux/FreeBSD systems
for the moment until we can straighten this out.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@203207 91177308-0d34-0410-b5e6-96231b3b80d8