x11/libxkbfile: Update to 1.1.0

Update x11/libxkbfile to 1.1.0
This release adds support for the NoLock, NoUnlock and genKeyEvent
flags, as well as other minor fixes.

Add INSTALL_TARGET=install-strip to strip installed binaries and libraries

Changelog:
https://lists.x.org/archives/xorg-announce/2019-March/002977.html

Sponsored by: B3 Init