[CRIU] [PATCH] Makefile: suppress git describe warnings

[Cyrill Gorcunov]

On Fri, May 27, 2016 at 04:16:46PM +0300, Dmitry Safonov wrote:
> This should fix errors on build envs, where git tags haven't
> been fetched. I.e, Travis-ci does not fetch tags before
> building a project, wich results in:
>    ---> Running in 0d63a3d28a7a
>   fatal: No names found, cannot describe anything.
>   fatal: No names found, cannot describe anything.
>   make[1]: Entering directory '/criu'
> 
> The other way is to fetch tags on `git describe` failure, but
> it that way has two cons:
> - it will change user's git (and I'm not sure it's right);
> - we need not only fetch tags in that case, but also remotes,
>   as otherwise it will fail with "fatal: No tags can describe <hash>":
>   https://travis-ci.org/0x7f454c46/criu/jobs/133362045#L1748
> 
> Cc: Cyrill Gorcunov <gorcunov at openvz.org>
> Signed-off-by: Dmitry Safonov <dsafonov at virtuozzo.com>
Acked-by: Cyrill Gorcunov <gorcunov at openvz.org>