update gocapability

gocapability has fixed can't get ambient cap problem
and some other fixes.

Signed-off-by: Ma Shimiao <[email protected]>

Author: Ma Shimiao

vendor.conf

@@ -7,7 +7,7 @@ github.com/mrunalp/fileutils ed869b029674c0e9ce4c0dfa781405c2d9946d08
 github.com/opencontainers/selinux v1.0.0-rc1
 github.com/seccomp/libseccomp-golang 32f571b70023028bd57d9288c20efbcb237f3ce0
 github.com/Sirupsen/logrus 26709e2714106fb8ad40b773b711ebce25b78914
-github.com/syndtr/gocapability e7cb7fa329f456b3855136a2642b197bad7366ba
+github.com/syndtr/gocapability db04d3cc01c8b54962a58ec7e491717d06cfcc16
 github.com/vishvananda/netlink 1e2e08e8a2dcdacaae3f14ac44c5cfa31361f270
 # systemd integration.
 github.com/coreos/go-systemd v14