* Update table of required image formats (#427)
This commit updates the table of required image formats. The table is built depending on the profile of the device, the requested image type, and the avaiablitiy of relevent extensions.
* Fixed incorrect argument to memcpy.
* Made image format arrays static.
* Utilised ARRAY_SIZE where appropriate.
* Re-named required image format bools to be more explicit.
* Made sRGBA, CL_UNORM_INT8 a required full format profile.
Misinterpretation of the spec had made this optional.
* check_minimum_supported: switched to using vectors.
* Added CL_sRGB CL_UNORM_INT8 to full profile required formats.
This matches the same channel data type requirement as CL_sRGBA.
* Overload <= and >= for the Version class.
* Correct the condition under which sRGB images are required.
* Correct the required image formats are based on OpenCL version.
The spec says that for different OpenCL versions, different sets of image formats are required.
* Print out the correct OpenCL version when required image format is not found.
* Improved the way in which image formats are added based on profile and version.
* Potential build fix regarding isnan namespace issues.
* Image Helpers: Remove duplicate copies when building required image format vectors.
Also re-ordered a branch to make it clearer.
4c59bfa32f