fdo#80363 _wfullpath in MyThes and Hyphen

(cherry-picked from commit d7374d4812316a79916956f03c8bd4a281fdbdec)

Conflicts:

	external/hyphen/hyphen-fdo48017-wfopen.patch

Change-Id: I4232040d4c62220389ca356797d18b1c87673e64
Reviewed-on: https://gerrit.libreoffice.org/10422
Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>