Fixed busybox to compile against dietlibc a bit more, crypt() comes from unistd.h according to POSIX.

base/busybox/dietlibc.patch

@@ -26,3 +26,14 @@
  
  /* ============ Misc helpers */
  
+--- ./libbb/pw_encrypt.c.orig	2007-07-21 19:35:23.000000000 -0400
++++ ./libbb/pw_encrypt.c	2007-07-21 19:35:36.000000000 -0400
+@@ -8,7 +8,7 @@
+  */
+ 
+ #include "libbb.h"
+-#include <crypt.h>
++#include <unistd.h>
+ 
+ char *pw_encrypt(const char *clear, const char *salt)
+ {