https://bugs.webkit.org/show_bug.cgi?id=84707

Reviewed by Gustavo Noronha Silva.

Most of the warnings have been fixed now that FindCairo.cmake and
FindGLIB.cmake have been rewritten. The remaining one, related to
FindFontconfig.cmake, shows up when building on a 64-bit
Debian-based systems.

jhbuild installs libraries into lib64/ by default on 64-bit Linux
installations, while CMake does not look for libraries in lib64/
when /etc/debian_version exists on the system. The FIND_LIBRARY()
would then sometimes end up using the system installation instead of
the jhbuild one, causing mismatches and, when pkg-config is not used
at all, failing to find libraries altogether.

* efl/jhbuildrc: Set the CMAKE_LIBRARY_PATH environment variable
when use_lib64 is set to force CMake to look into lib64/ regardless
of the presence of /etc/debian_version.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@127003 268f45cc-cd09-0410-ab3c-d52691b4dbfc