Install missing packages to satisfy build.sh

[fweikert]

Progress towards https://github.com/bazelbuild/vscode-bazel/issues/252

[philwo]

Tests are failing due to a permission denied error.. probably the file mentioned is not marked as executable? :( Any idea why or how to fix / workaround?

[fweikert]

Yeah, I had to "chmod +x" locally, and it worked. It's a mess

[jmhodges]

I fixed those permission errors in #258 with a small change to scripts/build.sh. If you include that, you should be able to update your PR successfully.

[jfirebaugh]

This seems to be fixed. vsce package currently completes without error.