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

src/scopeinfo.h

Index: src/scopeinfo.h
diff --git a/src/scopeinfo.h b/src/scopeinfo.h
index 93734f5a16c2b4842915cc83b46a0c8a77f25eb3..56c5309692d2bae01f998bd39c6642c9fd02e97f 100644
--- a/src/scopeinfo.h
+++ b/src/scopeinfo.h
@@ -114,9 +114,9 @@ class ContextSlotCache {
 
     // Bit fields in value_ (type, shift, size). Must be public so the
     // constants can be embedded in generated code.
-    class ModeField:  public BitField<VariableMode,       0, 3> {};
-    class InitField:  public BitField<InitializationFlag, 3, 1> {};
-    class IndexField: public BitField<int,                4, 32-4> {};
+    class ModeField:  public BitField<VariableMode,       0, 4> {};
+    class InitField:  public BitField<InitializationFlag, 4, 1> {};
+    class IndexField: public BitField<int,                5, 32-5> {};
 
    private:
     uint32_t value_;