[csmith-project/creduce] 5fa068: Fix new LLVM --cxxflags parsing for OS X.

[Eric Eide <eeide@cs.utah.edu>]

  Branch: refs/heads/master
  Home:   https://github.com/csmith-project/creduce
  Commit: 5fa0685e968a12467f77b905874189a5304d599c
      https://github.com/csmith-project/creduce/commit/5fa0685e968a12467f77b905874189a5304d599c
  Author: Eric Eide <eeide@cs.utah.edu>
  Date:   2015-09-24 (Thu, 24 Sep 2015)

  Changed paths:
    M clang_delta/Makefile.am
    M clang_delta/Makefile.in
    M configure
    M m4/ax_llvm.m4

  Log Message:
  -----------
  Fix new LLVM --cxxflags parsing for OS X.

Guess what?  The command "sed -e 's/[ \t][ \t]*/\n/g'" doesn't work with
the `sed' that comes with OS X 10.10.5.  Sigh.

This commit replaces that command with a `tr | sed | tr' pipeline that
works on OS X.