package/lcms2: disable tiff

tiff is only used by tificc sample and upstream rejected the patch to
fix the static build failure because "adding pkg-config dependency for a
sample is an overkill": https://github.com/mm2/Little-CMS/pull/244



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>