Initial inclusion of libfprint.

Summary:
Initial inclusion of libfprint.

Changelog:

2018-06-12: v0.8.1 release

• Brown paperbag release to install the udev rules file in the correct directory if the udev pkg-config file doesn't have a trailing slash

2018-06-12: v0.8.0 release

• Port to meson as the build system
• Port documentation to gtk-doc

• Drivers:
  • Add Elan driver
  • Increase threshold to detect encryption on URU4000 devices
  • Remove already replaced UPEKE2 driver
  • Fix possible crash caused by vfs5011 when no lines were captured

• Library:
  • Fix a number of memory and file descriptor leaks and warnings
  • Make NSS (and URU4000) driver optional
  • Fix assembling of frames for non-reverse and non reverse stripes
  • Split internal private header to clarify drivers API
  • Simplify logging system, now all the builds can be used to output debug information
  • Mark fp_dscv_print functions as deprecated

• Udev rules:
  • Add some unsupported devices to the whitelist

Test Plan:

1. Install libfprint
2. Install test build of fprintd (can be packaged after inclusion of libfprint)
3. fprintd-enroll, enroll fingerprint
4. fprintd-list <username>, confirm enrolled
5. Run fprintd-verify on enrolled finger and other fingers, verifying correct working.

Have tested with ThinkPad X220 Upek sensor and can confirm working library.

Reviewers: Triage Team, DataDrake, JoshStrobl, Devil505

Reviewed By: Triage Team, DataDrake, JoshStrobl

Subscribers: aleksvor, davidjharder, abdulocracy, kyrios123, feskyde, ggdaynight, JoshStrobl, DataDrake

Maniphest Tasks: T4882

Differential Revision: https://dev.getsol.us/D1657