Added rotation support for DrawString and DrawDriverString

The EmfPlusDrawString record specifies text output with string formatting.
The EmfPlusDrawDriverString record specifies text output
with character positions.

Now both EMF+ records properly support rotation.

Change-Id: I15a7a6dd2b8a209cf2aac2af75d7dd89cedd1aeb
Reviewed-on: https://gerrit.libreoffice.org/62783
Tested-by: Jenkins
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>