[!119] Narrow compiler/options for skipping testcornerstoragerefwrap

Merge branch 'narrow-testskip-to-bad-config' into 'master'

ref:core/dune-geometry We now only skip if

-   The compiler is gcc 8.2.\*
-   The compile options include -ftree-loop-vectorize (possibly implicitly due
    to -O3)

We also complain loudly during cmake configure run, as this issue might
miscompile other code than just the test.

Closes: [#19], [#21]

See merge request [!119]

  [#19]: gitlab.dune-project.org/NoneNone/issues/19
  [#21]: gitlab.dune-project.org/NoneNone/issues/21
  [!119]: gitlab.dune-project.org/core/dune-geometry/merge_requests/119


Closes #19 and #21