Expose "Custom Build Flag" on /result API GET requests

Problem Definition

When viewing results of an API call for build results, there is not a way to distinguish results which were 'run customized'

Suggested Solution

We already flag custom runs in the UI with the "Custom Build" flag. Can we expose this flag on the API?

Workaround

add a script task within the Bamboo plan, that will add a 'Label' to the build results if a certain global variable = TRUE. Then when running the customized build, override the global variable to be equal to true. This will add the label to the build results, which is visable in the API.

http://myhost.com:8085/rest/api/latest/result/{projectKey}-{buildKey}-{buildNumber}/label