coregl_fastpath: Keep states synchronization between color mask functions

coregl_fastpath: Keep states synchronization between color mask functions

Functions glColorMask, glColorMaski and glColorMaskiOES
operate common states, they should be kept synchronization
state gl_color_writemask should be an array in the form
of a two-dimensional array whose size if 4*4, glColorMask
set them all uniformly, glColorMaski and glColorMaskiOES
set them respectively

Signed-off-by: Zhaowei Yuan <zhaowei.yuan@samsung.com>
Change-Id: Icbb59a06a66942929d01be54921eeecd794cb475