Bug Report: Signing tools missing

[smithaaron]

Describe the bug
Signing tools don't seem to be available in the images, meaning signed release builds can't be built.

To Reproduce
Try to create a signed release build using CircleCi image.

Expected behavior
Build succeeds

Actual Behaviour
Build fails with the error

./scripts/bitbucket/build-release.sh: line 7: zipalign: command not found
./scripts/bitbucket/build-release.sh: line 8: apksigner: command not found

Workarounds
None that i'm aware of.

Additional context
We're using the CircleCi image with bitbucket. Non signed debug builds work just fine. It's just the zipalign and apksigner commands that fail.

[smithaaron]

I've worked around this by referencing the tools by their absolute path, e.g. "$ANDROID_HOME"/build-tools/34.0.0/apksigner. I assume the issue is that they need to be added to the PATH variable.