STATUS update for GCC
STATUS update for GCC

* STATUS (libcaf_single): Tweak wording.
  (Collectives): CO_BROADCAST is now supported in GCC.

zbeekman/opencoarrays,zbeekman/opencoarrays,sourceryinstitute/opencoarrays,sourceryinstitute/opencoarrays,jerryd/opencoarrays,jerryd/opencoarrays,jerryd/opencoarrays,sourceryinstitute/opencoarrays,zbeekman/opencoarrays