Add CI_CO_SUPPRESS_JIT flag

Summary: We still need to apply this in the Python compiler, but at least it exists to get things moving for now.

Reviewed By: DinoV

Differential Revision: D60866627

fbshipit-source-id: 64a06d8f89e31f8e3fa09c4efe0f48b324ac7aae

Include/cpython/code.h

@@ -202,6 +202,10 @@ struct PyCodeObject _PyCode_DEF(1);
 #define CO_FUTURE_GENERATOR_STOP  0x800000
 #define CO_FUTURE_ANNOTATIONS    0x1000000
 
+// See also extra-py-flags.h in CinderX. This still needs to be defined here as
+// we will (T198117958) use this flag in the Python compiler.
+#define CI_CO_SUPPRESS_JIT       0x40000000
+
 /* This should be defined if a future statement modifies the syntax.
    For example, when a keyword is added.
 */