flaky test: tcg tests, cross-i686-tci runner, "run-memory" test

The "memory" test in the tcg tests seems to be flaky on the i686 TCI CI job. These jobs:

all failed with

make[1]: *** [Makefile:187: run-memory] Error 124
make: *** [/builds/qemu-project/qemu/tests/Makefile.include:56: run-tcg-tests-i386-softmmu] Error 2

Edited Jan 08, 2024 by Peter Maydell

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