Don't use generated headers for embedded janet

code, use object files.

src/core/corelib.c

@@ -25,8 +25,9 @@
 #include "state.h"
 #include "util.h"
 
-/* Generated header */
-#include <generated/core.h>
+/* Generated bytes */
+extern const unsigned char *janet_gen_core;
+extern size_t janet_gen_core_size;
 
 /* Use LoadLibrary on windows or dlopen on posix to load dynamic libaries
  * with native code. */
@@ -809,7 +810,7 @@ JanetTable *janet_core_env(void) {
     janet_def(env, "_env", ret, "The environment table for the current scope.");
 
     /* Run bootstrap source */
-    janet_dobytes(env, janet_gen_core, sizeof(janet_gen_core), "core.janet", NULL);
+    janet_dobytes(env, janet_gen_core, janet_gen_core_size, "core.janet", NULL);
 
     return env;
 }