fixes for rhel7 at SPI
fixes for rhel7 at SPI

mcanthony/oiio,OpenImageIO/oiio,lgritz/oiio,micler/oiio,lgritz/oiio,cwilling/oiio,lgritz/oiio,bdeluca/oiio,mcanthony/oiio,micler/oiio,cwilling/oiio,OpenImageIO/oiio,sambler/oiio,sambler/oiio,cwilling/oiio,bdeluca/oiio,YangYangTL/oiio,bdeluca/oiio,mcanthony/oiio,bdeluca/oiio,OpenImageIO/oiio,OpenImageIO/oiio,YangYangTL/oiio,YangYangTL/oiio,YangYangTL/oiio,sambler/oiio,mcanthony/oiio,lgritz/oiio,micler/oiio,micler/oiio,sambler/oiio,cwilling/oiio