In addition to the whole-system emulation/virtualization, QEMU also
supports user-mode emulation, where the emulation happens as a normal
process inside the parent system. This allows running most tests by
simply spawning remote-test-server inside user-mode emulation.
Unfortunately, QEMU always writes its own message in addition to the
system one when a core dump happens, which breaks a few tests which
match on the exact output of the system.
This PR changes those tests to strip the (possible) QEMU output before
checking if the output is expected.
Adding ignore fuchsia tests for signal interpretation cases
Tests where Signal interpreting is required. Since Fuchsia currently does not return signals of type `libc::SIGSEGV` etc., instead, use generalized `!status.success()` case.
cc. `@djkoloski`
r? `@tmandry`
