Updated diff to only contain formatted changes for new code.

Updated diff to only contain formatted changes for new code.

In D46427#1102066, @lantictac wrote:

Also: Just noticed that response files aren't being expanded inline in the stored command-line (as per MSVC link.exe). I'll open a bug for it.

I updated the implementation according to the recommendation by Peter. I also added a comment regarding /FUNCTIONPADMIN default padding on ARM platforms.
Also ran git-clang-format against the source files so that the diff shows only my changes.

In D49366#1163821, @pcc wrote:

Unless I'm missing something, doesn't this patch end up adding padding to the end of every code section rather than the beginning?

It seems like this ought to be implemented by changing the section layout code. I'm thinking that you would add code to http://llvm-cs.pcc.me.uk/tools/lld/COFF/Writer.cpp#742 that does this:

if (C requires padding) {
  RawSize += Padding;
  VirtualSize += Padding;
}

With that I don't think you need to add fields for storing the amount of padding required, you can just figure it out on the fly there.