tests: Mark expected FreeBSD failures due to pr16696

Live debugging for threaded inferiors is not yet implemented on FreeBSD


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@187131 91177308-0d34-0410-b5e6-96231b3b80d8
tests: Mark expected FreeBSD failures due to pr16706

Watchpoints are not yet working on FreeBSD


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@187134 91177308-0d34-0410-b5e6-96231b3b80d8