Old: com.sun.star.io.IOException: SfxBaseModel::impl_store <file:///c:/lo/bugs/saved.xhtml> failed: 0x507

New: com.sun.star.io.IOException: SfxBaseModel::impl_store <file:///c:/lo/bugs/saved.xhtml> failed: 0x507(Error Area:Io Class:Access Code:1287)

It's much easier to find the relevant define in include/vcl/errcode.hxx based
on the new output.

Change-Id: I7d98dcf1ead10264672b45de570e51a153090499
Reviewed-on: https://gerrit.libreoffice.org/47319Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>