Disable CppunitTset_sc_*_functions_test for linux_aarch64 for now, too

Disable CppunitTset_sc_*_functions_test for linux_aarch64 for now, too

> Oct 20 10:21:31 <sberg> erAck, when "Testing
>  file:///run/build/libreoffice/sc/qa/unit/data/functions/array/fods/linest.fods"
>  in CppunitTest_sc_array_functions_test fails with non-informative expected 1
>  vs. actual 0, how can I reasonably debug that?  (and no, I don't have an X11
>  connection to the relevant machine, to see what opening that .fods with LO
>  would look like there)
> Oct 20 10:25:04 <erAck> sberg: sigh.. we're still lacking an "analyze steps"
>  in the functions test loader, so far only loading the doc and inspecting
>  provides that; maybe getting individual cell results via UNO would work

So disable these tests for aarch64 for now too, to get Flathub builds unstuck,
until somebody finds a way to actually debug this.

Change-Id: I9bf30d0d7185497f9ad4b04b60b6a67f34a8c44e

Gbp-Pq: Name arm64-disable-sc-functions-test.diff