Problem:
On "arm clang unittest" CI job, `make unittest` sometimes fails with
lots of these messages:
FAILED test/unit/testutil.lua @ 773: ...
test/unit/testutil.lua:773:
test/unit/testutil.lua:297: declaration specifier expected near '_Static_assert' at line 429
exit code: 256
stack traceback:
test/unit/testutil.lua:773: in function 'itp_parent'
test/unit/testutil.lua:811: in function <test/unit/testutil.lua:801>
Solution:
Update filter_complex_blocks.
(cherry picked from commit adb5d8a646)
4f6c711fc0