Result:
  [japdoll@dsafonov criu]$ touch Makefile
  [japdoll@dsafonov criu]$ make
  make[1]: Entering directory '/home/japdoll/tools/criu'
    PBCC     images/macvlan.pb-c.c
    DEP      images/macvlan.pb-c.d
    PBCC     images/autofs.pb-c.c
    DEP      images/autofs.pb-c.d
    PBCC     images/sysctl.pb-c.c
    DEP      images/sysctl.pb-c.d
  <...>

travis-ci: success for Fix rebuild on Makefile changes
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>