This patch adds support for the /FUNCTIONPADMIN command-line option (allowing an image to be hotpatched) described here: https://msdn.microsoft.com/en-us/library/ms173524.aspx
Even though LLD understands /FUNCTIONPADMIN, all it does is ignore it.
I added parsing of this command-line option (note that it accepts an additional integer argument specifying the number of padding bytes, e.g. /FUNCTIONPADMIN:10) and added support for it in the section chunks and when writing PDB contributions.
Nit: we tend to name configuration fields after the flag that they're derived from. So this one should be called FunctionPadMin I think. With that you don't need the comment either because it becomes redundant with the name of the field, and you can group it with the other uint32_t fields below.