Starting migration from gnuk to own solution.

gnuk/openpgp will be left as another pkcs15 app.
Lots of work has been done in the meanwhile.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

file.h

@@ -64,6 +64,7 @@ extern file_t *search_by_name(uint8_t *name, uint16_t namelen);
 extern file_t *search_by_path(const uint8_t *pe_path, uint8_t pathlen, const file_t *parent);
 extern bool authenticate_action(const file_t *ef, uint8_t op);
 extern void process_fci(const file_t *pe);
+extern void scan_flash();
 
 extern file_t file_entries[];