Add missing header files (facebookresearch#3218)

Summary:
The current CMakeList.txt misses a few header files. This PR adds these missing files.

Pull Request resolved: facebookresearch#3218

Reviewed By: mlomeli1

Differential Revision: D53081725

Pulled By: algoriddle

fbshipit-source-id: 94531b39350f6d5b9f8c1bedbb1286f265e99a09

Author: kyamagu

faiss/CMakeLists.txt

@@ -147,6 +147,7 @@ set(FAISS_HEADERS
   index_io.h
   impl/AdditiveQuantizer.h
   impl/AuxIndexStructures.h
+  impl/CodePacker.h
   impl/IDSelector.h
   impl/DistanceComputer.h
   impl/FaissAssert.h
@@ -198,6 +199,7 @@ set(FAISS_HEADERS
   utils/prefetch.h
   utils/quantize_lut.h
   utils/random.h
+  utils/sorting.h
   utils/simdlib.h
   utils/simdlib_avx2.h
   utils/simdlib_emulated.h

faiss/gpu/CMakeLists.txt

@@ -238,6 +238,7 @@ generate_ivf_interleaved_code()
 
 if(FAISS_ENABLE_RAFT)
   list(APPEND FAISS_GPU_HEADERS
+          impl/RaftUtils.h
           impl/RaftIVFFlat.cuh
           impl/RaftFlatIndex.cuh)
   list(APPEND FAISS_GPU_SRC