[pkg-go] Building the race detector runtime support from source

[Michael Hudson-Doyle]

Hi there,

It was pointed out during the review of my Go 1.5 package for Ubuntu
that the current go packaging includes files for race detector support
that is not built from source included in the source package, so I
made a package that does build them from source (basically it turns
the instructions from
https://go.googlesource.com/go/+/master/src/runtime/race/README into a
debian/rules file). It seems to me that it would make sense to do this
in Debian too? You can grab the package from here:

https://launchpad.net/ubuntu/+source/golang-race-detector-runtime/0.0+svn229396-0ubuntu1

Cheers,
mwh