The EmfPlusDrawlLines record specifies drawing a series of connected lines.
Bit 0x2000 indicates whether to draw an extra line between the last point
and the first point, to close the shape.
In this commit support of additional line which close shape was added.

Change-Id: I47ae3d8003cbfdd5b8ff5ba78e1ebe10f97af04b
Reviewed-on: https://gerrit.libreoffice.org/36317Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>