fix CMake build
fix CMake build

Summary:
ThriftServerConfig.cpp was introduced and the CMake build was not
updated.

Reviewed By: kmancini

Differential Revision: D37286038

fbshipit-source-id: de695777a7659bf731c0e83ef69d8f49adf5f5f8

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift