Enable the saving of a mini dump (on Windows) using the existing lldb save-core command.
Also plumbs a new method into SBProcess, and adds a very basic test to make sure it produces a file.
Future tests will open the mini dump in LLDB and make sure that it has the right information.
Greg, is there any reason why this couldn't be an llvm::StringRef? I know historically we have used this char* mechanism, but it seems like StringRef could be a better, safer alternative than passing raw strings through the SB API. As long as you provide an appropriate typemap, everything should work out.