ams: revamp target firmware

fusee/fusee-secondary/src/fs_utils.h

@@ -13,7 +13,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
- 
+
 #ifndef FUSEE_FS_UTILS_H
 #define FUSEE_FS_UTILS_H
 
@@ -25,4 +25,6 @@ size_t dump_to_file(const void *src, size_t src_size, const char *filename);
 bool is_valid_folder(const char *path);
 bool is_valid_file(const char *path);
 
+bool is_valid_concatenation_file(const char *path);
+
 #endif