Process: Uncomment disabled tests and make compatible with Darwin
Process: Uncomment disabled tests and make compatible with Darwin

- Handle differences in output from /bin/cat on Linux/macOS when
  printing an error.

- test_pipe_stdout_and_stderr_same_pipe(): Dont pass malloc debug
  flags to subprocesses when debugging under Xcode.

- runTask(): return stdout and stderr as separate values so the
  malloc debug is captured separately.

johnno1962c/swift-corelibs-foundation,apple/swift-corelibs-foundation,alblue/swift-corelibs-foundation,alblue/swift-corelibs-foundation,e78l/swift-corelibs-foundation,ikesyo/swift-corelibs-foundation,ikesyo/swift-corelibs-foundation,bolshedvorsky/swift-corelibs-foundation,apple/swift-corelibs-foundation,bolshedvorsky/swift-corelibs-foundation,e78l/swift-corelibs-foundation,mattrajca/swift-corelibs-foundation,e78l/swift-corelibs-foundation,apple/swift-corelibs-foundation,johnno1962b/swift-corelibs-foundation,amraboelela/swift-corelibs-foundation,johnno1962c/swift-corelibs-foundation,mattrajca/swift-corelibs-foundation,JGiola/swift-corelibs-foundation,johnno1962c/swift-corelibs-foundation,ikesyo/swift-corelibs-foundation,amraboelela/swift-corelibs-foundation,alblue/swift-corelibs-foundation,johnno1962b/swift-corelibs-foundation,ikesyo/swift-corelibs-foundation,bolshedvorsky/swift-corelibs-foundation,e78l/swift-corelibs-foundation,parkera/swift-corelibs-foundation,amraboelela/swift-corelibs-foundation,JGiola/swift-corelibs-foundation,johnno1962b/swift-corelibs-foundation,johnno1962b/swift-corelibs-foundation,parkera/swift-corelibs-foundation,apple/swift-corelibs-foundation,alblue/swift-corelibs-foundation,ikesyo/swift-corelibs-foundation,parkera/swift-corelibs-foundation,JGiola/swift-corelibs-foundation,johnno1962c/swift-corelibs-foundation,apple/swift-corelibs-foundation,alblue/swift-corelibs-foundation,mattrajca/swift-corelibs-foundation,JGiola/swift-corelibs-foundation,amraboelela/swift-corelibs-foundation,JGiola/swift-corelibs-foundation,bolshedvorsky/swift-corelibs-foundation,parkera/swift-corelibs-foundation,johnno1962c/swift-corelibs-foundation,amraboelela/swift-corelibs-foundation,bolshedvorsky/swift-corelibs-foundation,mattrajca/swift-corelibs-foundation,e78l/swift-corelibs-foundation,johnno1962b/swift-corelibs-foundation,mattrajca/swift-corelibs-foundation,parkera/swift-corelibs-foundation