generic: early (incomplete!) 4.0 support

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 44511

target/linux/generic/patches-4.0/921-use_preinit_as_init.patch

@@ -0,0 +1,12 @@
+--- a/init/main.c
++++ b/init/main.c
+@@ -956,7 +956,8 @@ static int __ref kernel_init(void *unuse
+ 		panic("Requested init %s failed (error %d).",
+ 		      execute_command, ret);
+ 	}
+-	if (!try_to_run_init_process("/sbin/init") ||
++	if (!try_to_run_init_process("/etc/preinit") ||
++	    !try_to_run_init_process("/sbin/init") ||
+ 	    !try_to_run_init_process("/etc/init") ||
+ 	    !try_to_run_init_process("/bin/init") ||
+ 	    !try_to_run_init_process("/bin/sh"))