pcre2 tests fail on ppc64le

[ignatenkobrain]

failures:
---- bytes::tests::max_jit_stack_size_does_something stdout ----
thread 'bytes::tests::max_jit_stack_size_does_something' panicked at 'called `Result::unwrap_err()` on an `Ok` value: true', src/libcore/result.rs:997:5
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
failures:
    bytes::tests::max_jit_stack_size_does_something
test result: FAILED. 14 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out