A year ago this flag was removed, as parts of criu were build in
sub-directories (i.e. by using make -C SUBDIR), and therefore
paths printed by make were relevant to a SUBDIR rather than top
source dir, which prevented tools like vim from jumping to a
correct source file with with error (for more details, see
commit XXXXXX "nmk: remove no-print-directory from MAKEFLAGS").

Now, as we have everything (except Documentation and test, which
is rather minor) built from top source directory, we can finally
add the flag back and enjoy cleaner output.
Reviewed-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>