Introduce ClassDescriptor#getStaticScope()

Will be used to exterminate hacks related to static Java methods in our
codebase: synthetic class object for enum, synthetic package for static members
of Java classes, etc.

compiler/frontend/src/org/jetbrains/jet/lang/descriptors/impl/MutableClassDescriptor.java

@@ -57,8 +57,9 @@ public class MutableClassDescriptor extends ClassDescriptorBase implements Class
     private final WritableScope scopeForMemberResolution;
     // This scope contains type parameters but does not contain inner classes
     private final WritableScope scopeForSupertypeResolution;
-    private WritableScope scopeForInitializers = null; //contains members + primary constructor value parameters + map for backing fields
+    private WritableScope scopeForInitializers; //contains members + primary constructor value parameters + map for backing fields
     private JetScope scopeForMemberLookup;
+    private final JetScope staticScope = new StaticScopeForKotlinClass(this);
 
     public MutableClassDescriptor(
             @NotNull DeclarationDescriptor containingDeclaration,
@@ -295,6 +296,12 @@ public class MutableClassDescriptor extends ClassDescriptorBase implements Class
         return (WritableScope) scopeForMemberLookup;
     }
 
+    @NotNull
+    @Override
+    public JetScope getStaticScope() {
+        return staticScope;
+    }
+
     public void lockScopes() {
         getScopeForMemberLookupAsWritableScope().changeLockLevel(WritableScope.LockLevel.READING);
         if (classObjectDescriptor instanceof MutableClassDescriptor) {

compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/descriptors/LazyClassDescriptor.java

@@ -88,6 +88,7 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
     private final MemoizedFunctionToNotNull<JetClassObject, ClassDescriptor> extraClassObjectDescriptors;
 
     private final LazyClassMemberScope unsubstitutedMemberScope;
+    private final JetScope staticScope = new StaticScopeForKotlinClass(this);
 
     private final NotNullLazyValue<JetScope> scopeForClassHeaderResolution;
     private final NotNullLazyValue<JetScope> scopeForMemberDeclarationResolution;
@@ -300,6 +301,12 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
                 scope, getScopeForMemberDeclarationResolution());
     }
 
+    @NotNull
+    @Override
+    public JetScope getStaticScope() {
+        return staticScope;
+    }
+
     @NotNull
     @Override
     public Collection<ConstructorDescriptor> getConstructors() {