[PATCH 5/5] gitignore: Ignore golang package directory

[Nick Rosbrook <rosbrookn@xxxxxxxxx>]

> With golang, you don’t really distribute package binaries; you only 
> distribute source files.
> 
> However, we don’t want to wait until someone tries to clone the package to 
> see if we’ve broken the build; so the current makefile does a “build test” of 
> the package files.
> 
> Before golang’s “modules” feature, the only way to do this was to have the 
> code to build inside $GOPATH/src/$PACKAGENAME.  We can set GOPATH but we 
> can’t change the “src” component of that.  So we used to set GOPATH to 
> $XENROOT/tools/golang, put the files in 
> $XENROOT/tools/golang/src/$PACKAGENAME, and 
> 
> With the “modules” feature, code can be built anywhere; the build at the 
> moment doesn’t require GOPATH.
> 
> If we’re willing to limit ourselves to using versions of golang which support 
> modules by default (1.12+), then we can probably get rid of this bit instead. 
>  (And if we do want to support older versions, we should really add some code 
> in the configure script to determine whether to build with modules or GOPATH.)
> 
> Nick, any opinions?

I can't think of a reason we need to support anything older than go
1.11, so I think it would be fine to get rid of remnants of the GOPATH
build.

-NR