add go.env as new GOPROXY file

Signed-off-by: Toshaan Bharvani <toshaan@powerel.org>

SPECS/golang.spec

@@ -257,7 +257,7 @@ rm -rf $RPM_BUILD_ROOT
 rm -rf pkg/obj/go-build/*
 mkdir -p $RPM_BUILD_ROOT%{_bindir}
 mkdir -p $RPM_BUILD_ROOT%{goroot}
-cp -apv api bin doc lib pkg src misc test VERSION $RPM_BUILD_ROOT%{goroot}
+cp -apv api bin doc lib pkg src misc test VERSION go.env $RPM_BUILD_ROOT%{goroot}
 
 echo "== 2 =="
 find $RPM_BUILD_ROOT%{goroot}/src -exec touch -r $RPM_BUILD_ROOT%{goroot}/VERSION "{}" \;