[Reproducers] Implement log_append for function pointers.

Changing the type in the DUMMY macro to void* doesn't actually fix the
build error, because the argument type is deducted from the template (as
opposed to when serializing through the instrumentation framework, where
this would matter). Instead I've added a proper instance of log_append
that takes function pointers and logs their address.

llvm-svn: 355863

lldb/source/API/SBExpressionOptions.cpp

@@ -180,7 +180,7 @@ void SBExpressionOptions::SetLanguage(lldb::LanguageType language) {
 void SBExpressionOptions::SetCancelCallback(
     lldb::ExpressionCancelCallback callback, void *baton) {
   LLDB_RECORD_DUMMY(void, SBExpressionOptions, SetCancelCallback,
-                    (void *, void *), callback, baton);
+                    (lldb::ExpressionCancelCallback, void *), callback, baton);
 
   m_opaque_up->SetCancelCallback(callback, baton);
 }