Stepan Salenikovich authored Sep 16, 2015 and Guillaume Roguez committed Sep 16, 2015

This lets package maintainers communicate to the client
where Ring is expected to be installed (eg: /usr/local),
in the case where this differs from what is set by
CMAKE_INSTALL_PREFIX

Issue: #78928
Change-Id: Ieb78fa8a519da9783de3233d371fd00308aee82d