Use an older version of dummy.cpp to work around weird build break

This is probably needed as my tree seems slightly out of sync.
Add a bunch of untracked files

For some reason these files were not being tracked. Probably once again
related to my crappy internet connection and attempting to work around it.
Update to OS/2 version of nsprpub/configure
Don't use dwarf2 debug info on OS/2

This is needed to keep the build systems in sync
Add another untracked file