img: Introduce O_FORCE_LOCAL flag for images

 criu/image-desc.c    | 4 ++--
 criu/image.c         | 4 ++--
 criu/include/image.h | 1 +
 3 files changed, 5 insertions(+), 4 deletions(-)

In order to prepare for remote snapshots (possible with Image Proxy and Image
Cache) the O_FORCE_LOCAL flag is added to force some images not to be remote
and stay as local files in the file system.

Signed-off-by: Rodrigo Bruno <rbruno@gsd.inesc-id.pt>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>