folks: explicitly disable building with LTO
folks: explicitly disable building with LTO

Since version 0.12 libfolks is building with LTO (Link Time Optimizations)
by default. This leads to a several problems, e.g. Geary simply crashes
with segfault at startup.
Explicitly disable LTO during build to avoid such malfunction.

Signed-off-by: Alexander Lobakin <b82d6ee7e5208bd8f37959704135515035945bb5@dlink.ru>

necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages