[xml] libxml2: generate a libxml2-config.cmake file

[Samuel Martin <s martin49 gmail com>]

Hi,


libxml2 has some optional dependencies (e.g. zlib).

When building a project using CMake as build-system, it is sometimes
hard to track the libxml2 dependendies and the required ldflags,
especially when statically linking the binaries.

To make this step easier, libxml2 already an xml2-config script and a
libxml-2.0.pc.
Is it possible to also generate a libxml2-config.cmake file?


Best regards,

-- 
Samuel