This modifies the Makefile so that gx and gx-go downloads are first
attempted from the local ipfs gateway (127.0.0.1:8080) and then
from the offical gateway (ipfs.io).
Make and wget doesn't work well dealing with stuff in subfolders,
so I have moved deptools-related rules to the deptools folder in its own
Makefile.
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
