(ambassador) (apro) docker.mk: Fix the APro build having stale .stamp files laying around
(ambassador) (apro) docker.mk: Fix the APro build having stale .stamp files laying around

(cherry picked from commit 5c4c69e7dd30781e530559a1caea4c80c87b584e)

datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador