fix(Makefile): Rename staticfiles make target. Fixes #2010

[dtaniwaki]

Fixes #2010

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[alexec]

What about using ‘$(HOME)/go/bin?

[codecov]

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[dtaniwaki]

What about using ‘$(HOME)/go/bin?

Do we have to use an actual file name as the make target? The make target installs staticfiles in your GOPATH. I think the target name has nothing to do with the environment.

[alexec]

The goal of the task was to take advantage of the Makefile to install the tool, based on this blog post that installed gometalinter in the same way.

https://sahilm.com/makefiles-for-golang/

But I don't feel very strongly about this particular target - as Go is pretty snappy installing this, so I'll approve.