test: Bump up runc to 9f9c96235cc97674e935002fc3d78361b696a69e

This brings in a fix for a cgroups setup race condition
that we hit sometimes in the tests.

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/github.com/opencontainers/runc/libcontainer/notify_linux.go

@@ -44,9 +44,9 @@ func registerMemoryEvent(cgDir string, evName string, arg string) (<-chan struct
 	ch := make(chan struct{})
 	go func() {
 		defer func() {
-			close(ch)
 			eventfd.Close()
 			evFile.Close()
+			close(ch)
 		}()
 		buf := make([]byte, 8)
 		for {