Make global_object a global with the new name smjs_global_object and

create smjs_init_global_object to initialise the global.

src/scripting/smjs/global_object.h

@@ -3,6 +3,11 @@
 
 #include "ecmascript/spidermonkey/util.h"
 
-JSObject *smjs_get_global_object(void);
+/* The root of the object hierarchy. If object 'foo' has this as its parent,
+ * you can use foo's method and properties with 'foo.<method|property>'. */
+extern JSObject *smjs_global_object;
+
+/* Create the global object and assign it to smjs_global_object. */
+void smjs_init_global_object(void);
 
 #endif