In addition to updating the version to 2.12, the following
modifications were applied to the port:
- Use the name lcms2 for the library, as it is called upstream since
version 2 of Little-CMS.
Remark: In the past, the library has already been called lcms2 for
a while in vcpkg (1e53c60 until 726c111).
The ports in vcpkg, which currently require the port lcms
(devil, libraw and opencolorio), use and support lcms2 include/lib.
- Add generating a pkg-config file
- Add quotes to file commands in portfile.cmake
