am 903e390f: Merge "art: -Wsystem-header warning"
am 903e390f: Merge "art: -Wsystem-header warning"

* commit '903e390ffd46955628d1161ccfa8de9177d42d22':
  art: -Wsystem-header warning

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst