package/wpebackend-fdo: bump to version 1.2.2

This is a bugfix release which solves an underlinking issue, which would
prevent building in some situations (for example, when --no-undefined is
passed to the linker). Release notes:

  https://wpewebkit.org/release/wpebackend-fdo-1.2.2.html



Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>