lcms: Update to version 2.6.
lcms: Update to version 2.6.

Signed-off-by: Rudá Moura <3ceaf19413469ca7df9f6a96603874755ef36481@gmail.com>

FelixZhang00/rudix,FelixZhang00/rudix,rudix-mac/rudix,rudix-mac/rudix,FelixZhang00/rudix,FelixZhang00/rudix,rudix-mac/rudix