go 1.9.1

[leonklingele]

• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

[leonklingele]

This release fixes two security issues, golang/go#22131 and golang/go#22133

[cblecker]

@leonklingele You need to bump the revision on Formulas/godep.rb

[leonklingele]

@cblecker done. I wonder why this needs to be done though.

[fxcoudert]

Thanks @leonklingele for the pull request!

[DomT4]

I wonder why this needs to be done though.

The godep executable stores the full Cellar path to go rather than the opt_prefix, sadly.