sw doc model dump: handle SvxCharRotateItem

Change-Id: I981867bcf4ec5fa6be866b19f82805ab4ff9623f
fdo#69636 DOCX export: fix VML export of vert=vert270 drawingML textframes

Change-Id: I2fc01c1f22dcd55c2fc4d4791c5571ff2861d0cc