<rdar://problem/13878726>

Yet another implementation of the python in dSYM autoload :)
This time we are going with a ternary setting:
true - load, do not warn
false - do not load, do not warn
warn - do not load, warn (default)




git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@182414 91177308-0d34-0410-b5e6-96231b3b80d8