Localized range separators resulted broken XLSX export
with duplicated built-in names. For example, XLSX export
of a Format->Print range using Hungarian locale in LibO
raised an error message in MSO, because the export
contained the same range also with a bad semicolon:

<definedName>Sheet1!$A:$A;Sheet1!$1:$1</definedName>
<definedName>Sheet1!$A:$A,Sheet1!$1:$1</definedName>

Change-Id: Iee6ff7c5f5952fc1e736cebfc290c64a851786ab
Reviewed-on: https://gerrit.libreoffice.org/71538
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>