FIXUP: Add IMAGE_LAYOUT

FIXUP: Add IMAGE_LAYOUT

commit 6f5bca9057be71e818982c4cece0cb5ed1743b0f
Author: Courtney Goeltzenleuchter <courtney@LunarG.com>
Date:   Wed Mar 25 11:25:10 2015 -0600

    xgl: Add IMAGE_LAYOUT to Cmd*Image* calls

    This is part 2 of bug #12904.
    (2) Blit operations need to know what layout images are in. How do they figure that out?

    - Added new parameter(s) specifying the image layout(s) to the following functions:
        xglCmdCopyImage
        xglCmdCopyBufferToImage
        xglCmdCopyImageToBuffer
        xglCmdClearColorImage
        xglCmdClearColorImageRaw
        xglCmdClearDepthStencilImage
        xglCmdResolveImage