package/libwpe: bump to version 1.4.0.1

package/libwpe: bump to version 1.4.0.1

This is a very minor bugfix release which solves an issue with wrong
version numbers in the headers included in the 1.4.0 release tarball,
without any functional changes. Programs which explicitly check for
version 1.4.0 of libwpe will not build or run without this update.
While Buildroot which use libwpe do not need this applied, they may
in the future. Also, third-party packages added through a BR2_EXTERNAL
may depend on using a version of libwpe which corrects the issue with
the version numbers.

Release notes:

  https://wpewebkit.org/release/libwpe-1.4.0.1.html

Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>