build: Install 64bit libraries in proper place
build: Install 64bit libraries in proper place

In case 'libdir' is not specified, select lib or lib64 depending on the
machine.

kyoushuu/grilo,kyoushuu/grilo,GNOME/grilo,kyoushuu/grilo,grilofw/grilo,jasuarez/grilo,kyoushuu/grilo,MathieuDuponchelle/grilo,grilofw/grilo,jasuarez/grilo,MathieuDuponchelle/grilo,MathieuDuponchelle/grilo,jasuarez/grilo,grilofw/grilo,GNOME/grilo