/usr/include/GNUstep/TalkSoupBundles is in talksoup.app 1.0alpha-32-g55b4d4e-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/GNUstep/../../lib/GNUstep/Frameworks/TalkSoupBundles.framework/Headers