Eike says that no LO code should use ICU number parser/formatter, but
meanwhile ICU is also used in the externals firebird, harfbuzz,
hunspell, libcdr, libebook, libfreehand, libmspub, libqxp, libivsio,
libxml2, libzmf, pdfium, xmlsec, so let's just patch it to be sure.

Change-Id: I3e1a76d7ceefadbe3c514ad7f1384a4daa196f36
Reviewed-on: https://gerrit.libreoffice.org/68098Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>
Tested-by: Michael Stahl <Michael.Stahl@cib.de>
(cherry picked from commit 5f04bdfc)
Reviewed-on: https://gerrit.libreoffice.org/68111
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>