chart2, sw: remaining textbox DOCX import test preparations

Ideally now all testcases handle both cases during DOCX import:

- current situation, when shape with text is imported as a Writer
  TextFrame
- future situation, when shape with text will be imported as shape with
  an assicated TextBox

Change-Id: I5b95ff4672cecf39eb744f8557f967ade73404c0
Use ImplInheritanceHelper

Change-Id: I259bf6012684e393765cfd73e813bcf2875abd5f
rtl::Reference fits just fine here

Change-Id: I268f6d2577b727c6aa072ee766b3f5f41bdb131b
rtl::Reference fits just fine here

Change-Id: I65499ac299fb474e581245c5237a0b184f1f2b60
rtl::Reference fits just fine here

Change-Id: Ib48999c7fe532b2a8bf5222ef27d8d4929937e3b
rtl::Reference fits just fine here

Change-Id: I14cdcab307f1d2edcebb9fd4aa3009daa32bc7d1
rtl::Reference fits just fine here

Change-Id: I354b546654e665607d9be0d65f6327fabb5694de
Remove newly unused comphelper::ImplementationReference

Change-Id: If272d5025e08fcf5e67de30ffdf177383ef59370
Update config.{guess,sub}

...to latest versions from <http://git.savannah.gnu.org/gitweb/?p=config.git;
a=blob_plain;f=config.guess;hb=HEAD> and <http://git.savannah.gnu.org/gitweb/?
p=config.git;a=blob_plain;f=config.sub;hb=HEAD>, for aarch64 support.

Change-Id: If4ed1a6ced85947ee5b1b923fd09b4d679140145