update libssecomp-golang to v0.9.1

vendor/github.com/seccomp/libseccomp-golang/README

@@ -24,3 +24,28 @@ please note that a Google account is not required to subscribe to the mailing
 list.
 
 	-> https://groups.google.com/d/forum/libseccomp
+
+Documentation is also available at:
+
+	-> https://godoc.org/github.com/seccomp/libseccomp-golang
+
+* Installing the package
+
+The libseccomp-golang bindings require at least Go v1.2.1 and GCC v4.8.4;
+earlier versions may yield unpredictable results.  If you meet these
+requirements you can install this package using the command below:
+
+	$ go get github.com/seccomp/libseccomp-golang
+
+* Testing the Library
+
+A number of tests and lint related recipes are provided in the Makefile, if
+you want to run the standard regression tests, you can excute the following:
+
+	$ make check
+
+In order to execute the 'make lint' recipe the 'golint' tool is needed, it
+can be found at:
+
+	-> https://github.com/golang/lint
+