Fix whitespace / formatting



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@209737 91177308-0d34-0410-b5e6-96231b3b80d8
Avoid passing null signal name for Log %s argument



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@209739 91177308-0d34-0410-b5e6-96231b3b80d8