py/persistentcode: Bump .mpy version to 5.

The bytecode opcodes have changed (there are more, and they have been
reordered).

py/persistentcode.h

@@ -31,7 +31,7 @@
 #include "py/emitglue.h"
 
 // The current version of .mpy files
-#define MPY_VERSION 4
+#define MPY_VERSION 5
 
 enum {
     MP_NATIVE_ARCH_NONE = 0,

tests/import/mpy_native.py

@@ -50,11 +50,11 @@ class UserFS:
 # these are the test .mpy files
 user_files = {
     # bad architecture
-    '/mod0.mpy': b'M\x04\xff\x00\x10',
+    '/mod0.mpy': b'M\x05\xff\x00\x10',
 
     # test loading of viper and asm
     '/mod1.mpy': (
-        b'M\x04\x0b\x1f\x20' # header
+        b'M\x05\x0b\x1f\x20' # header
 
         b'\x38' # n bytes, bytecode
             b'\x01\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\xff' # prelude

tools/mpy-tool.py

@@ -57,7 +57,7 @@ class FreezeError(Exception):
         return 'error while freezing %s: %s' % (self.rawcode.source_file, self.msg)
 
 class Config:
-    MPY_VERSION = 4
+    MPY_VERSION = 5
     MICROPY_LONGINT_IMPL_NONE = 0
     MICROPY_LONGINT_IMPL_LONGLONG = 1
     MICROPY_LONGINT_IMPL_MPZ = 2