Update vendored runc to v1.0.0.0-rc94

Note that this is the code in containerd that uses runc (as almost
a library). Please see the other commit for the update to runc binary
itself.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

vendor/github.com/cilium/ebpf/syscalls.go

@@ -383,7 +383,7 @@ func wrapMapError(err error) error {
 		return ErrNotSupported
 	}
 
-	return errors.New(err.Error())
+	return err
 }
 
 func bpfMapFreeze(m *internal.FD) error {