std_go_args: add -tags flag

[botantony]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example. (no needed)
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew typecheck with your changes locally?
• Have you successfully run brew tests with your changes locally?

---

A convenient way to set -tags flag with multiple values in std_go_args

[MikeMcQuaid]

Thanks @botantony! How many formulae would make use of this?

[botantony]

@MikeMcQuaid grep shows that about 57 formulae in core repository have line with -tags

[MikeMcQuaid]

@MikeMcQuaid grep shows that about 57 formulae in core repository have line with -tags

@botantony Are they using std_go_args too? If so: let's do this!

[botantony]

Just checked manually, most of them are Go formulae that use std_go_args

[MikeMcQuaid]

Thanks again @botantony!