Recommend allowing debugging code on Windows

[Siddhant628]

Currently, the SConstruct file isn't specifying any variables to generate the program database (.pdb) file for the native code in the debug configuration on Windows.

I think it should default to generating it in debug configuration. This is how it used to be in an earlier version of the example, probably the change was introduced due to removal of the /ZI compiler option from the SConstruct.

I used the PDB variable for this so that I can step through code. :)