[csmith-project/creduce] 9d96ce: Fix CMake-based build under FreeBSD 10.2.

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

  Branch: refs/heads/master
  Home:   https://github.com/csmith-project/creduce
  Commit: 9d96ce6c550ccaef593b1091fbb9a1ffb3dd4252
      https://github.com/csmith-project/creduce/commit/9d96ce6c550ccaef593b1091fbb9a1ffb3dd4252
  Author: Eric Eide <eeide@cs.utah.edu>
  Date:   2016-12-10 (Sat, 10 Dec 2016)

  Changed paths:
    M clang_delta/CMakeLists.txt

  Log Message:
  -----------
  Fix CMake-based build under FreeBSD 10.2.

Add `clangARCMigrate` to the libs for `clang_delta`.  This fixes
linking errors for people who use FreeBSD 10.2 and the "llvm39"
package.

(Forgot to add this to previous commit; sorry!)