Allow Turbofan optimization of Ignition generators

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index 490d7b2a3dc3a94a2d4744b8158230cd979be533..ff2df1020d6b58868798c3d64cdef8b4bbf15566 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -91,6 +91,7 @@ namespace internal {
   V(kGraphBuildingFailed, "Optimized graph construction failed")               \
   V(kHeapNumberMapRegisterClobbered, "HeapNumberMap register clobbered")       \
   V(kHydrogenFilter, "Optimization disabled by filter")                        \
+  V(kIllegalBytecode, "Illegal bytecode")                                      \
   V(kImportDeclaration, "Import declaration")                                  \
   V(kIndexIsNegative, "Index is negative")                                     \
   V(kIndexIsTooLarge, "Index is too large")                                    \