Block clock_adjtime in default seccomp config

clock_adjtime is the new posix style version of adjtime allowing
a specific clock to be specified. Time is not namespaced, so do
not allow.

Signed-off-by: Justin Cormack <justin.cormack@unikernel.com>

daemon/execdriver/native/seccomp_default.go

@@ -28,6 +28,12 @@ var defaultSeccompProfile = &configs.Seccomp{
 			Action: configs.Errno,
 			Args:   []*configs.Arg{},
 		},
+		{
+			// Time/Date is not namespaced
+			Name:   "clock_adjtime",
+			Action: configs.Errno,
+			Args:   []*configs.Arg{},
+		},
 		{
 			// Time/Date is not namespaced
 			Name:   "clock_settime",