WORKSPACE: Update debian9 and debian10 for latest security updates
WORKSPACE: Update debian9 and debian10 for latest security updates

The GCP container security scanner is now reporting some
vulnerabilities in Distroless packages. This update should fix them.

2019-10-01 openssl openssl1.0
https://security-tracker.debian.org/tracker/CVE-2019-1563
https://security-tracker.debian.org/tracker/CVE-2019-1547

2019-09-22 expat
https://security-tracker.debian.org/tracker/CVE-2019-15903

GoogleContainerTools/distroless,istio/distroless,GoogleContainerTools/distroless,istio/distroless,GoogleContainerTools/distroless,istio/distroless