This was broken because GenericSalLayout::LayoutText() sets the
SalLayoutFlags::KashidaJustification flag as a side-effect of building
the glyph list. So in case we cache the list and not build it, the flag
will be missing. This means that later in
GenericSalLayout::ApplyDXArray() kashida glyphs won't be inserted.

With this, the workaround in sw can be removed.

Change-Id: Ic18211bf50ca673daa238e8950a381915e4b3096
Reviewed-on: https://gerrit.libreoffice.org/69566Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins