Move c/h files implementing/defining standard library stuff into a new libc directory, also standard'ify some parts of the code base (almost entirely #include fixes).

This is to a) to cleanup firmware/common and firmware/include a bit, but also b) for Rockbox as an application which should use the host system's c library and headers, separating makes it easy to exclude our files from the build.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25850 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/lib/strncpy.c

@@ -39,6 +39,7 @@ QUICKREF
 
 #include <string.h>
 #include <limits.h>
+#include "plugin.h"
 
 /*SUPPRESS 560*/
 /*SUPPRESS 530*/