Fix JS_ReadString for wide strings on big endian targets (#354)

swap words of wide character strings upon loading on a big endian target.

Author: chqrlie

quickjs.c

@@ -33614,7 +33614,13 @@ static JSString *JS_ReadString(BCReaderState *s)
     }
     memcpy(p->u.str8, s->ptr, size);
     s->ptr += size;
-    if (!is_wide_char) {
+    if (is_wide_char) {
+        if (is_be()) {
+            uint32_t i;
+            for (i = 0; i < len; i++)
+                p->u.str16[i] = bswap16(p->u.str16[i]);
+        }
+    } else {
         p->u.str8[size] = '\0'; /* add the trailing zero for 8 bit strings */
     }
 #ifdef DUMP_READ_OBJECT