mavgen_javascript_stable: use 'A' in struct definitions for 'int8_t',…

… 'uint8_t' types. We found issus with jspack when treating these binary arrays as strings. Specifying A (byte array) makes more sense anyway.

generator/mavgen_javascript_stable.py

@@ -248,8 +248,10 @@ def mavfmt(field):
         }
 
     if field.array_length:
-        if field.type in ['char', 'int8_t', 'uint8_t']:
+        if field.type in ['char']:
             return str(field.array_length)+'s'
+        if field.type in ['int8_t', 'uint8_t']:
+            return str(field.array_length)+'A'
         return str(field.array_length)+map[field.type]
     return map[field.type]