Update cffi patch

Author: msimacek

graalpython/lib-graalpython/patches/cffi/sdist/cffi-1.15.1.patch

@@ -11,3 +11,58 @@ index 2cdb76b..ab91032 100644
      nargs = PyTuple_GET_SIZE(fargs);
  #if defined(MS_WIN32) && !defined(_WIN64)
      if (fabi == FFI_STDCALL)
+diff --git a/c/lib_obj.c b/c/lib_obj.c
+index 38bf3d5..9954f3b 100644
+--- a/c/lib_obj.c
++++ b/c/lib_obj.c
+@@ -46,10 +46,10 @@ static struct CPyExtFunc_s *_cpyextfunc_get(PyObject *x)
+ 
+     fo = (PyCFunctionObject *)x;
+     lo = (LibObject *)y;
+-    if (lo->l_libname != fo->m_module)
++    if (lo->l_libname != _PyCFunction_GetModule(fo))
+         return NULL;
+ 
+-    return (struct CPyExtFunc_s *)(fo->m_ml);
++    return (struct CPyExtFunc_s *)(_PyCFunction_GetMethodDef(fo));
+ }
+ 
+ static PyObject *_cpyextfunc_type(LibObject *lib, struct CPyExtFunc_s *exf)
+diff --git a/c/misc_thread_common.h b/c/misc_thread_common.h
+index 66e2835..bc32b1b 100644
+--- a/c/misc_thread_common.h
++++ b/c/misc_thread_common.h
+@@ -329,6 +329,7 @@ static PyThreadState *get_current_ts(void)
+ 
+ static PyGILState_STATE gil_ensure(void)
+ {
++    return PyGILState_Ensure();
+     /* Called at the start of a callback.  Replacement for
+        PyGILState_Ensure().
+     */
+diff --git a/cffi/_cffi_include.h b/cffi/_cffi_include.h
+index e4c0a67..53b7d06 100644
+--- a/cffi/_cffi_include.h
++++ b/cffi/_cffi_include.h
+@@ -121,7 +121,7 @@ extern "C" {
+ #endif
+ 
+ /**********  CPython-specific section  **********/
+-#ifndef PYPY_VERSION
++#if !defined(PYPY_VERSION) && !defined(GRAALVM_PYTHON)
+ 
+ 
+ #if PY_MAJOR_VERSION >= 3
+diff --git a/cffi/_embedding.h b/cffi/_embedding.h
+index 8e8df88..90fdcd6 100644
+--- a/cffi/_embedding.h
++++ b/cffi/_embedding.h
+@@ -113,7 +113,7 @@ static void _cffi_release_reentrant_mutex(void)
+ 
+ 
+ /**********  CPython-specific section  **********/
+-#ifndef PYPY_VERSION
++#if !defined(PYPY_VERSION) && !defined(GRAALVM_PYTHON)
+ 
+ #include "_cffi_errors.h"
+