xmloff: ODF import: fix spelling of "extrusion-first-light-level"
xmloff: ODF import: fix spelling of "extrusion-first-light-level"

The attribute is not imported currently due to the typo, but is exported
with the correct spelling from shapeexport.cxx:4377 with
XML_EXTRUSION_FIRST_LIGHT_LEVEL.

Change-Id: I83d77e7eabbbc961fa4f7faf8e20b47601ba071b
Reviewed-on: https://gerrit.libreoffice.org/16641
Reviewed-by: Michael Stahl <eef8671db506f9731c0438a7613853b6391ca841@redhat.com>
Tested-by: Michael Stahl <eef8671db506f9731c0438a7613853b6391ca841@redhat.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core