188.8.131.52: restore buildability on Windows after 184.108.40.206.
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
src/runtime/wrap.h: Add preprocessor conditionals to guard against repeated
tools-for-build/grovel-headers.c: grovel the wrapped stat types on win32.