And use it in getClob, so LO can display clob values like the return
value of the built-in List function.

Change-Id: I395016e945dbeb2c6bb3737b6345d40ff9f48089
Reviewed-on: https://gerrit.libreoffice.org/32938Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Bunth <btomi96@gmail.com>