Improve Docker export in embedded-binaries Makefile

Ensure that the binaries are moved into place, instead of sequentially
written. Use a temporary untar folder for that, and touch the file there
before moving it.

Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com>

embedded-bins/Makefile

@@ -65,7 +65,12 @@ $(bindir)/kubelet.exe $(bindir)/kube-proxy.exe: .container.kubernetes.windows
 $(bindir)/containerd.exe $(bindir)/containerd-shim-runhcs-v1.exe: .container.containerd.windows
 
 $(addprefix $(bindir)/, $(bins)): | $(bindir)
-	docker export $$(cat $<) | tar -C $(dir $(bindir)) -xv bin/$(notdir $@) && touch $@
+	tardir=$$(mktemp -d -- '$(notdir $@).XXXXXX.tmp') \
+	  && trap "rm -rf -- $$tardir" INT EXIT \
+	  && docker export "$$(cat $<)" \
+	  | tar -C "$$tardir" -x bin/$(notdir $@) \
+	  && touch -c -- "$$tardir"/bin/$(notdir $@) \
+	  && mv "$$tardir"/bin/$(notdir $@) $@
 
 build_docker_container = \
 	rm -f -- '$@'; \