tests: Enable build/ALL/gem5 supported-isas-check tests

These tests were disabled until the build/ALL/gem5 compilation was
complete. These test the `gem5.runtime.get_supported_isas` function.

Change-Id: Ieac5676e9fed121f3cfe35e38f9748431824cbc0
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63332
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed