1.0.11.30: restore buildability on Windows after 1.0.11.27.

1.0.11.30: restore buildability on Windows after 1.0.11.27.

src/runtime/wrap.c: move conditional definition of WIN32_LEAN_AND_MEAN
                    so that it precedes other #includes, to prevent
		    conflicting win32 stuff from being pulled in by the
                    new wrap.h.

src/runtime/wrap.h: Add preprocessor conditionals to guard against repeated
                    inclusion.

tools-for-build/grovel-headers.c: grovel the wrapped stat types on win32.