app-crypt/gnupg: Minor changes to 2.1.16

app-crypt/gnupg: Minor changes to 2.1.16

For now tools subdir always needs to be built, even though the use flag controls
whether some of the resulting binaries are installed or not, as e.g
gpg-connect-agent and gpg-wks-client is expected to be installed unconditionally.

Given that tools subdir is a cheap build, this doesn't constitute much of an
actual issue, but upstream is notified.

Gentoo-Bug: 600208

Add patch to mitigate test failure due to overlong socket path.

Package-Manager: portage-2.3.2