recipes/gnutls: disable stdatomic.h header detection
recipes/gnutls: disable stdatomic.h header detection

Until we can move to clang where this is not all struct access.

GStreamer/cerbero,GStreamer/cerbero,atsushieno/cerbero,nirbheek/cerbero,nirbheek/cerbero,centricular/cerbero,fluendo/cerbero,atsushieno/cerbero,centricular/cerbero,centricular/cerbero,fluendo/cerbero,atsushieno/cerbero,nirbheek/cerbero,centricular/cerbero,atsushieno/cerbero,centricular/cerbero,fluendo/cerbero,fluendo/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero,atsushieno/cerbero,GStreamer/cerbero,fluendo/cerbero