This updates the introspection build process that we also check on
changes in the Makefiles when we generate the NMake Makefile snippets
and file lists, so that any changes to the source file list can be
reflected. Also ensure that we build against the freshly-built
libraries.
Make the NMake Makefiles also output the built introspection items to
the output directories of the various Visual Studio versions, according
to the build configuration and architecture, so that we avoid confusion
for different Visual Studio build configs.
6b55898162