Regression from d379d186 (oox: import
WPS shape with text as shape with textbox, 2014-06-18), the position of
the textbox should be relative to the print area of the text frame, not
to the text frame itself.

Change-Id: I2b591dc46ad4967edd8a1691d9b100ef0d74bed3
Reviewed-on: https://gerrit.libreoffice.org/58009
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>