tests: Disable use of ptrace() in tests on BSD and macOS
Commit cf55c311 added a new test which
uses ptrace()
to check some GSubprocess
behaviour. FreeBSD uses
different symbol names for ptrace symbols, and we haven’t tested whether
the test works (and reproduces the failure) on FreeBSD, so skip the test
for now.
Signed-off-by: Philip Withnall philip@tecnocode.co.uk