cbe: hack around invalid Air

Can be changed to `!inst_ty.hisRuntimeBitsIgnoreComptime()` when the
"result location with inferred type ends up being pointer to comptime_int"
test stops producing Air containing a `bitcast(*comptime_int, ...)`.

See #13410
5f31070b8bJacob Young committed on 11/2/2022, 2:20:31 PMparentd8635af
2 files changedLine totals unavailable