wireguard: bump to release 0.0.20171005 for 17.01

wireguard: bump to release 0.0.20171005 for 17.01

WireGuard is well documented for being an experimental project, not
currently ready to be stabilized. As such, it's important for packagers
to always keep the project up to date in all contexts.

However, it is common for some projects, such as LEDE/OpenWrt to have
stable branches, which don't expect a lot of churn or modification.

The WireGuard that happened to ship with 17.01 is broken and crufty and
shouldn't be used at all. It's highly unlikely that there's anybody out
there even using it; it won't work with anything else.

So, this commit updates the 17.01 package to the latest upstream
version. Because the 17.01 stable branch can't be updated all the time,
it's important that this bump here in this commit is a stable one.

I believe 0.0.20171005 to be a fairly stable snapshot, which should be
suitable for the 17.01 branch. As stated earlier, the 0.0.20170115
currently in this branch is highly problematic. 0.0.20171005 offers
extremely important changes.

I'll continue to send package bumps for 17.01, but only for snapshot
releases that I think fix an important bug or provide a noted increase
in stability, or have similar goals to this commit.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>