Fix a typo in --with-qt3-wizard-package.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23342 57a11ea4-9604-0410-9ed3-97b8803252fd
Add --with-xdg-data-dirs to specify default search path for XDG data directories.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23343 57a11ea4-9604-0410-9ed3-97b8803252fd