py/binary: Handle storing big-ints to all arrays types.

Prior to this patch only 'q' and 'Q' type arrays could store big-int
values.  With this patch any big int that is stored to an array is handled
by the big-int implementation, regardless of the typecode of the array.
This allows arrays to work with all type sizes on all architectures.

py/binary.c

@@ -327,9 +327,10 @@ void mp_binary_set_val_array(char typecode, void *p, mp_uint_t index, mp_obj_t v
             break;
         default:
             #if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
-            if ((typecode | 0x20) == 'q' && MP_OBJ_IS_TYPE(val_in, &mp_type_int)) {
+            if (MP_OBJ_IS_TYPE(val_in, &mp_type_int)) {
+                size_t size = mp_binary_get_size('@', typecode, NULL);
                 mp_obj_int_to_bytes_impl(val_in, MP_ENDIANNESS_BIG,
-                    sizeof(long long), (byte*)&((long long*)p)[index]);
+                    size, (uint8_t*)p + index * size);
                 return;
             }
             #endif