- Drop suse_path.patch: replace it with a grep/sed logic replacing
/usr/libexec in all files with the correct value for all distros
(taking into account that openSUSE is in progress of migrating
from /usr/lib to /usr/libexec).

By using %{_libexecdir} we don't have to worry anymore what the real value is: the spec file will set the righe value no matter what.