Get rid of static module allocation, do it in code.

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index c9939d06c8b6de15615b6f5b83d8c411905486ea..751eaacc323cf37e3f83ea38eb77c9e44f88c286 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -335,7 +335,7 @@ namespace internal {
   F(PushWithContext, 2, 1) \
   F(PushCatchContext, 3, 1) \
   F(PushBlockContext, 2, 1) \
-  F(PushModuleContext, 1, 1) \
+  F(PushModuleContext, 2, 1) \
   F(DeleteContextSlot, 2, 1) \
   F(LoadContextSlot, 2, 2) \
   F(LoadContextSlotNoReferenceError, 2, 2) \
@@ -343,6 +343,7 @@ namespace internal {
   \
   /* Declarations and initialization */ \
   F(DeclareGlobals, 3, 1) \
+  F(DeclareModules, 1, 1) \
   F(DeclareContextSlot, 4, 1) \
   F(InitializeVarGlobal, -1 /* 2 or 3 */, 1) \
   F(InitializeConstGlobal, 2, 1) \