disable struct module

docs/pages/features.md

@@ -21,7 +21,6 @@ The following features are enabled and supported by the interpreter:
 * The `reversed` function.
 * The `min` and `max` function.
 * Module-level `__init__` imports.
-* The `struct` module.
 
 ## Unsupported
 
@@ -62,6 +61,7 @@ The following features are disabled and _not_ supported by the interpreter:
 * The `micropython` module.
 * The `array` module.
 * The `collections` module.
+* The `struct` module.
 * The `gc` module.
 * The `sys` module.
 * The `select` module.

lib/micropython

@@ -1 +1 @@
-Subproject commit 14eebf684d7b08142aee1388026443ffc8e94ebe
+Subproject commit 77538be9d2ff768c630c4cd7a27a8eeaf05d65de