add generated constant definitions to library

Summary: when trying to build openr with `getDeps.py` constant definitions where not available since they were not part of the generated thrift lib. this fixes it.

Reviewed By: chadaustin

Differential Revision: D16064417

fbshipit-source-id: ee2b3e061caf67235f4a873405cf6cd6fb663ef4

build/fbcode_builder/CMake/FBThriftCppLibrary.cmake

@@ -59,12 +59,12 @@ function(add_fbthrift_cpp_library LIB_NAME THRIFT_FILE)
   # Compute the list of generated files
   list(APPEND generated_headers
     "${output_dir}/gen-cpp2/${base}_constants.h"
-    "${output_dir}/gen-cpp2/${base}_constants.cpp"
     "${output_dir}/gen-cpp2/${base}_types.h"
     "${output_dir}/gen-cpp2/${base}_types.tcc"
     "${output_dir}/gen-cpp2/${base}_types_custom_protocol.h"
   )
   list(APPEND generated_sources
+    "${output_dir}/gen-cpp2/${base}_constants.cpp"
     "${output_dir}/gen-cpp2/${base}_data.h"
     "${output_dir}/gen-cpp2/${base}_data.cpp"
     "${output_dir}/gen-cpp2/${base}_types.cpp"