[Upstream] [lldb] Fix HAVE_LIBCOMPRESSION

Summary:
This test doesn't make sense. Change to be consistent with what we did
in GDBRemoteCommunication.cpp.

Reviewers: labath

Subscribers: lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D65965

Change-Id: Id28b8a6411237cf24cebb9d303fdd67956c762a2
llvm-svn: 368352