applypatch: use "index" lines not "applies-to".
applypatch: use "index" lines not "applies-to".

This matches the 3-way fallback used by applypatch to use
per-blob "index" lines, not "applies-to" tree object name, to
match what git-am does.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git