Tools: fixed syntax error in build_binaries.py

Tools/scripts/build_binaries.py

@@ -410,8 +410,7 @@ is bob we will attempt to checkout bob-AVR'''
                 try:
                     self.copyit(path, ddir, tag, vehicle)
                 except Exception as e:
-                    self.progress("Failed to copy %s to %s: %s",
-                                  path, ddir, str(e))
+                    self.progress("Failed to copy %s to %s: %s" % (path, ddir, str(e)))
                 # why is touching this important? -pb20170816
                 self.touch_filepath(os.path.join(self.binaries,
                                                  vehicle_binaries_subdir, tag))