Generate junit xml from `make codecheck`

[osrf-migration]

Original report (archived issue) by Nate Koenig (Bitbucket: Nathan Koenig).

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make codecheck could always generate junit xml, or we could make a new target that generates only junit xml.

[osrf-migration]

Original comment by Steve Peters (Bitbucket: Steven Peters, GitHub: scpeters).

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I have this working in the following branch, but I haven't tested it yet in CI

• https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-cmake/branch/codecheck_xml

[scpeters]

the branch is now on my fork on GitHub:

• https://github.com/gazebosim/gz-cmake/compare/ign-cmake2...scpeters:ign-cmake:codecheck_xml