This patch fixes the problem that the build for x64 fails in basic module
on 64bit Windows installed 32bit Excel Application.

New code checks the existance of ODBC driver for excel insted of the
existance of Excel application(at this time the bitness of ODBC driver for
excel would match that of building LibreOffice).

What we need is probably not Excel Application but ODBC drivers for proper
bitness.

Change-Id: I62285eb2351f2022754fc34cb2d54db1bd9e8142
Reviewed-on: https://gerrit.libreoffice.org/25301Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>