x11/libwacom: Update to 1.5

Update x11/libwacom to 1.5 [1]
Switch to use release archive instead of the github generated tarball [2]

Changelog:
https://github.com/linuxwacom/libwacom/releases/tag/libwacom-1.5
https://github.com/linuxwacom/libwacom/blob/libwacom-1.5/NEWS

PR: 249554 [1], 249503 [2]
Submitted by: jbeich [1], daniel.engberg.lists@pyret.net [2]
Differential Revision: https://reviews.freebsd.org/D26350