Fix CMake. Add tools/common (#345)
Fix CMake. Add tools/common (#345)

Summary:
Fixes Issue #344
Pull Request resolved: https://github.com/facebook/redex/pull/345

Reviewed By: thezhangwei

Differential Revision: D9758150

Pulled By: justinjhendrick

fbshipit-source-id: f4022f3b0e765db2e5d54e2e52c5651a82bb9c30

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex