Simplify ObjectFile::GetUUID

instead of returning the UUID through by-ref argument and a boolean
value indicating success, we can just return it directly. Since the UUID
class already has an invalid state, it can be used to denote the failure
without the additional bool.

llvm-svn: 353714

lldb/source/Plugins/ObjectFile/JIT/ObjectFileJIT.cpp

@@ -166,9 +166,9 @@ void ObjectFileJIT::Dump(Stream *s) {
   }
 }
 
-bool ObjectFileJIT::GetUUID(lldb_private::UUID *uuid) {
+UUID ObjectFileJIT::GetUUID() {
   // TODO: maybe get from delegate, not needed for first pass
-  return false;
+  return UUID();
 }
 
 uint32_t ObjectFileJIT::GetDependentModules(FileSpecList &files) {