Add Shared Modules files to the unified source build.
Created attachment 324571 [details] Patch
Created attachment 324572 [details] Patch
Committed r223847: <https://trac.webkit.org/changeset/223847>
This caused a windows build break: https://build.webkit.org/builders/Apple%20Win%20Release%20%28Build%29/builds/5448/steps/compile-webkit/logs/stdio https://build.webkit.org/builders/Apple%20Win%20Release%20%28Build%29/builds/5448
<rdar://problem/35568845>