Remove UUID::SetFromCString

Replace uses with SetFromStringRef. NFC.

llvm-svn: 335246
diff --git a/lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOS.cpp b/lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOS.cpp
index 8178b5b..4a8ad38 100644
--- a/lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOS.cpp
+++ b/lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOS.cpp
@@ -484,7 +484,7 @@
       std::string uuid_str =
           info_dict->GetValueForKey("shared_cache_uuid")->GetStringValue();
       if (!uuid_str.empty())
-        uuid.SetFromCString(uuid_str.c_str());
+        uuid.SetFromStringRef(uuid_str);
       if (info_dict->GetValueForKey("no_shared_cache")->GetBooleanValue() ==
           false)
         using_shared_cache = eLazyBoolYes;