[ignition,modules] Introduce bytecodes for loading/storing module variables.

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index cf1945df0674175faf22ce66131b30a4fdbbc153..3b503097931b6c0fc050dcd07929b3f64d463eb7 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -243,6 +243,7 @@ namespace internal {
   V(kUnsupportedLetCompoundAssignment, "Unsupported let compound assignment")  \
   V(kUnsupportedLookupSlotInDeclaration,                                       \
     "Unsupported lookup slot in declaration")                                  \
+  V(kUnsupportedModuleOperation, "Unsupported module operation")               \
   V(kUnsupportedNonPrimitiveCompare, "Unsupported non-primitive compare")      \
   V(kUnsupportedPhiUseOfArguments, "Unsupported phi use of arguments")         \
   V(kUnsupportedPhiUseOfConstVariable,                                         \