Add a fixed Bazel version for Project-Oak

[ipetr0v]

This change fixed Bazel version (1.1.0) used in Docker by Project-Oak.

Orginated from #3093 (comment)

[ipetr0v]

cc @tiziano88

[tiziano88]

Could you mention #3093 (comment) the commit message, since that's where the requirement is from.

[ipetr0v]

Looks like #3093 make this build fail in Travis.

[Dor1s]

The same error seems to still persist:

ERROR: /root/.cache/bazel/_bazel_root/872aac72dffae06b4e2a5b0308508d03/external/com_google_absl/absl/strings/BUILD.bazel:30:1: undeclared inclusion(s) in rule '@com_google_absl//absl/strings:strings':
this rule is missing dependency declarations for the following files included by 'external/com_google_absl/absl/strings/str_replace.cc':
  '/usr/local/lib/clang/10.0.0/share/asan_blacklist.txt'

Do you want to land this anyway?

[tiziano88]

Yes please, this is not a fix for that issue, but something we should do anyways.

Thanks