shimv2: fix the issue of reaping child mistakenly

For kata shimv2, the sub-reaper isn't needed, otherwise
it will break the cmd.Run() calling in govmmQemu.LaunchQemu().

Fixes: #939

Signed-off-by: fupan <lifupan@gmail.com>

cli/containerd-shim-kata-v2/main.go

@@ -10,6 +10,11 @@ import (
 	"github.com/kata-containers/runtime/containerd-shim-v2"
 )
 
+func shimConfig(config *shim.Config) {
+	config.NoReaper = true
+	config.NoSubreaper = true
+}
+
 func main() {
-	shim.Run("io.containerd.kata.v2", containerdshim.New)
+	shim.Run("io.containerd.kata.v2", containerdshim.New, shimConfig)
 }