write-or-die.h: move declarations for write-or-die.c functions from cache.h

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

send-pack.c

@@ -16,8 +16,9 @@
 #include "version.h"
 #include "oid-array.h"
 #include "gpg-interface.h"
-#include "cache.h"
 #include "shallow.h"
+#include "trace2.h"
+#include "write-or-die.h"
 
 int option_parse_push_signed(const struct option *opt,
 			     const char *arg, int unset)