mpy-cross: Enable building of x64 native .mpy files.

mpy-cross/gccollect.c

@@ -143,9 +143,6 @@ void gc_collect(void) {
     // GC stack (and regs because we captured them)
     void **regs_ptr = (void**)(void*)&regs;
     gc_collect_root(regs_ptr, ((mp_uint_t)MP_STATE_THREAD(stack_top) - (mp_uint_t)&regs) / sizeof(mp_uint_t));
-    #if MICROPY_EMIT_NATIVE
-    mp_unix_mark_exec();
-    #endif
     gc_collect_end();
 }
 

mpy-cross/mpconfigport.h

@@ -30,13 +30,15 @@
 #define MICROPY_PERSISTENT_CODE_LOAD (0)
 #define MICROPY_PERSISTENT_CODE_SAVE (1)
 
-#define MICROPY_EMIT_X64            (0)
+#define MICROPY_EMIT_X64            (1)
 #define MICROPY_EMIT_X86            (0)
 #define MICROPY_EMIT_THUMB          (0)
 #define MICROPY_EMIT_INLINE_THUMB   (0)
 #define MICROPY_EMIT_INLINE_THUMB_ARMV7M (0)
 #define MICROPY_EMIT_INLINE_THUMB_FLOAT (0)
 #define MICROPY_EMIT_ARM            (0)
+#define MICROPY_EMIT_XTENSA         (0)
+#define MICROPY_EMIT_INLINE_XTENSA  (0)
 
 #define MICROPY_DYNAMIC_COMPILER    (1)
 #define MICROPY_COMP_CONST_FOLDING  (1)