scripts: correctly source go bash config
scripts: correctly source go bash config

Previously would do the wrong thing if a shell was started anywhere
other than $HOME.

maxlang/cockroach,paperstreet/cockroach,veteranlu/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,glycerine/cockroach,petermattis/cockroach,petermattis/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,glycerine/cockroach,maxlang/cockroach,cockroachdb/cockroach,glycerine/cockroach,paperstreet/cockroach,petermattis/cockroach,veteranlu/cockroach,petermattis/cockroach,maxlang/cockroach,petermattis/cockroach,paperstreet/cockroach,paperstreet/cockroach,veteranlu/cockroach,glycerine/cockroach,cockroachdb/cockroach,cockroachdb/cockroach,glycerine/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,petermattis/cockroach,glycerine/cockroach,maxlang/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,paperstreet/cockroach,paperstreet/cockroach,veteranlu/cockroach,maxlang/cockroach,glycerine/cockroach,petermattis/cockroach,paperstreet/cockroach,veteranlu/cockroach,glycerine/cockroach,veteranlu/cockroach,cockroachdb/cockroach,petermattis/cockroach,maxlang/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,maxlang/cockroach,maxlang/cockroach,cockroachdb/cockroach