test: Add workaround for FreeBSD libedit vs readline issue
test: Add workaround for FreeBSD libedit vs readline issue

If stdout is not a terminal Python executes
    rl_variable_bind ("enable-meta-key", "off");

This produces a warning with FreeBSD's libedit because the
enable-meta-key variable is unknown.  Not an issue on Apple because
cpython commit f0ab6f9f0603 added a #ifndef __APPLE__ around the call.
See http://bugs.python.org/issue19884 for more information.

For now we just discard the warning output to get the tests working
again on FreeBSD.



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@226037 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb