[CRIU] seccomp zdtm tests compilation error

[Pavel Emelyanov]

Hi, Tycho.

On Travis we have the same error about absent bpf.h file as we had
in generic criu code:

https://travis-ci.org/cyrillos/criu/jobs/93309914

gcc -g -O2 -Wall -Werror -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 -iquote ../../lib/arch/x86/include -I../../lib seccomp_filter_tsync.c ../../lib/libzdtmtst.a -pthread -o seccomp_filter_tsync
seccomp_filter.c:10:23: fatal error: linux/bpf.h: No such file or directory
compilation terminated.

-- Pavel