<rdar://problem/12876503>

Adding a new setting interpreter.stop-command-source-on-error that dictates a default behavior for whether command source should stop upon hitting an error
You can still override the setting for each individual invocation with the usual -e setting



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@183719 91177308-0d34-0410-b5e6-96231b3b80d8