Log Message:
lcms2: Update to 2.15

Changelog:
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2.15 Maintenance release
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New MESON build system, many thanks to amispark and Lovell Fuller for bringing this.
Fixed a bug that caused memory corruption on colord
cmsReadRawTag can read portions  of tags again. Removing this caused colord to \ 
segfault when dumping profiles
Added more checks based of fuzzer discoveries.
MSYS2 can now compile lcms2
Checked on Apple Silicon M1 and M2
Fixed a bug of fastfloat plug-in that affected Krita CMYK color selector