This is taken from https://cmake.org/cmake/help/latest/manual/cmake-
developer.7.html#a-sample-find-module
And provides three customization points:
1. $package$ - ZLIB
2. $header$.h - zlib.h
3. $library$ - zlib
This way users can easily create FindZLIB.cmake find modules which can
be easily used as target_link_libraries(my-app PRIVATE ZLIB::ZLIB)
Change-Id: Id5143c46ecfde09419d4f43b9a3ff156401a88f9
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
