Adding vertex color in the second face-varying channel.
Adding vertex color in the second face-varying channel.

xldeveloper/OpenSubdiv,xldeveloper/OpenSubdiv,shengfuintel/OpenSubdiv,anshuarya/OpenSubdiv,anshuarya/OpenSubdiv,c64kernal/OpenSubdiv,takahito-tejima/OpenSubdiv,takahito-tejima/OpenSubdiv,takahito-tejima/OpenSubdiv,c64kernal/OpenSubdiv,anshuarya/OpenSubdiv,lookup1980/OpenSubdiv,xldeveloper/OpenSubdiv,nyotis/OpenSubdiv,shengfuintel/OpenSubdiv,lookup1980/OpenSubdiv,lookup1980/OpenSubdiv,nyotis/OpenSubdiv,shengfuintel/OpenSubdiv,c64kernal/OpenSubdiv,nyotis/OpenSubdiv