Test support for i686-linux-android was added in #132. When the tests are run without qemu if fails with:

thread '<unnamed>' panicked at 'assertion failed: signal(libc::SIGPIPE, libc::SIG_IGN) != libc::SIG_ERR', /checkout/src/libstd/sys/unix/mod.rs:81:8

Running the tests with qemu allows the cross tests to pass, for this reason qemu is used. But the error still happens some times, we need to investigate why this happen.