altivec: fix select1wb
altivec: fix select1wb

ahmedammar/platform_external_gst_liborc,okuoku/nmosh-orc,mojaves/orc,okuoku/nmosh-orc,ijsf/OpenWebRTC-orc,ijsf/OpenWebRTC-orc,jpakkane/orc,MOXfiles/orc,MOXfiles/orc,jpakkane/orc,Distrotech/orc,jpakkane/orc,MOXfiles/orc,okuoku/nmosh-orc,mojaves/orc,Distrotech/orc,ijsf/OpenWebRTC-orc,Distrotech/orc,mojaves/orc,ahmedammar/platform_external_gst_liborc