if ${WRKSRC}/.patched-newfiles was not created by the
prepare target of the original extraction (i.e. the
pre-existing diffs did not patch any new files into
existence), quell generation of patch files for files
which exist in ${WRKSRC} but do not exist in the
distfile
this quells creation of stuff like patch-deflate_o
in zlib after running a compile (although there are
still fallouts: patch-Makefile and patch-zconf_h,
which will only be not generated if WRKBUILD!=WRKSRC)
new policy (from OpenBSD ports): do not patch any
files into existence, use the ./extra facility instead.
git-svn-id: svn://www.freewrt.org/trunk/freewrt@410 afb5a338-a214-0410-bd46-81f09a774fd1
