gpsd: pro forma update to 3.27.2

[fhgwright]

The only changes from 3.27.1 are Linux-only changes related to udev and systemd. This update exists solely to avoid livecheck-induced FOMO.

TESTED:
Just a basic smoke test.

Description

Type(s)

• bugfix
• enhancement
• security fix

Tested on

OS X 10.9.5 13F1911, x86_64, Xcode 6.2 6C131e

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• [N/A] referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• [NO] tested basic functionality of all binary files?
• [NO] checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@michaelld for port gpsd.