Adding cython v0.20.2 in third-party.

third_party/cython/src/Cython/Includes/cpython/type.pxd

Index: third_party/cython/src/Cython/Includes/cpython/type.pxd
diff --git a/third_party/cython/src/Cython/Includes/cpython/type.pxd b/third_party/cython/src/Cython/Includes/cpython/type.pxd
new file mode 100644
index 0000000000000000000000000000000000000000..a1d094e37c713162ef45b2e2fc2774d7c2aaabbd
--- /dev/null
+++ b/third_party/cython/src/Cython/Includes/cpython/type.pxd
@@ -0,0 +1,48 @@
+
+cdef extern from "Python.h":
+    # The C structure of the objects used to describe built-in types.
+
+    ############################################################################
+    # 7.1.1 Type Objects
+    ############################################################################
+
+    ctypedef class __builtin__.type [object PyTypeObject]:
+        pass
+
+    # PyObject* PyType_Type
+    # This is the type object for type objects; it is the same object
+    # as type and types.TypeType in the Python layer.
+
+    bint PyType_Check(object o)
+    # Return true if the object o is a type object, including
+    # instances of types derived from the standard type object. Return
+    # false in all other cases.
+
+    bint PyType_CheckExact(object o)
+    # Return true if the object o is a type object, but not a subtype
+    # of the standard type object. Return false in all other
+    # cases.
+
+    bint PyType_HasFeature(object o, int feature)
+    # Return true if the type object o sets the feature feature. Type
+    # features are denoted by single bit flags.
+
+    bint PyType_IS_GC(object o)
+    # Return true if the type object includes support for the cycle
+    # detector; this tests the type flag Py_TPFLAGS_HAVE_GC.
+
+    bint PyType_IsSubtype(type a, type b)
+    # Return true if a is a subtype of b.
+
+    object PyType_GenericAlloc(object type, Py_ssize_t nitems)
+    # Return value: New reference.
+
+    object PyType_GenericNew(type type, object args, object kwds)
+    # Return value: New reference.
+
+    bint PyType_Ready(type type) except -1
+    # Finalize a type object. This should be called on all type
+    # objects to finish their initialization. This function is
+    # responsible for adding inherited slots from a type's base
+    # class. Return 0 on success, or return -1 and sets an exception
+    # on error.