add PyExc_GeneratorExit

Author: timfel

graalpython/com.oracle.graal.python.cext/src/exceptions.c

@@ -82,6 +82,7 @@ PyObject * PyExc_UnboundLocalError = NULL;
 PyObject * PyExc_NotImplementedError = NULL;
 PyObject * PyExc_RecursionError = NULL;
 PyObject * PyExc_UnicodeEncodeError = NULL;
+PyObject * PyExc_GeneratorExit = NULL;
 
 void initialize_exceptions() {
     PyExc_AttributeError = PY_EXCEPTION("AttributeError");
@@ -120,6 +121,7 @@ void initialize_exceptions() {
     PyExc_RecursionError = PY_EXCEPTION("RecursionError");
     PyExc_NotImplementedError = PY_EXCEPTION("NotImplementedError");
     PyExc_UnicodeEncodeError = PY_EXCEPTION("UnicodeEncodeError");
+    PyExc_GeneratorExit = PY_EXCEPTION("GeneratorExit");
 }