Move long compilations before Go install in Dockerfile
Move long compilations before Go install in Dockerfile

Now we can avoid long compilations on Go update.

Signed-off-by: Alexander Morozov <4efb7da3e38416208b41d8021a942884d8a9435c@docker.com>

aditirajagopal/docker,aditirajagopal/docker,aditirajagopal/docker