C#: Add default overlay annotations.

Author: michaelnebel

csharp/ql/lib/Customizations.qll

@@ -8,5 +8,7 @@
  * the `RemoteFlowSource` and `SummarizedCallable` classes associated with the security queries
  * to model frameworks that are not covered by the standard library.
  */
+overlay[local?]
+module;
 
 import csharp

csharp/ql/lib/IDEContextual.qll

@@ -1,6 +1,8 @@
 /**
  * Provides shared predicates related to contextual queries in the code viewer.
  */
+overlay[local?]
+module;
 
 import semmle.files.FileSystem
 private import codeql.util.FileSystem

csharp/ql/lib/Linq/Helpers.qll

@@ -2,6 +2,8 @@
  * Helpers.qll
  * Provides helper classes and methods related to LINQ.
  */
+overlay[local?]
+module;
 
 private import csharp
 private import semmle.code.csharp.frameworks.system.collections.Generic as GenericCollections

csharp/ql/lib/csharp.qll

@@ -1,6 +1,8 @@
 /**
  * The default C# QL library.
  */
+overlay[local?]
+module;
 
 import Customizations
 import semmle.code.csharp.Attribute

csharp/ql/lib/default.qll

@@ -1 +1,4 @@
+overlay[local?]
+module;
+
 import csharp

csharp/ql/lib/definitions.qll

@@ -2,6 +2,8 @@
  * Provides classes and predicates related to jump-to-definition links
  * in the code viewer.
  */
+overlay[local?]
+module;
 
 import csharp
 import IDEContextual

csharp/ql/lib/experimental/code/csharp/Cryptography/NonCryptographicHashes.qll

@@ -5,6 +5,8 @@
  * These predicates are intended for helping detect non-cryptographic hashes that may be used
  * in a context that is not appropriate, or for detecting modified hash functions
  */
+overlay[local?]
+module;
 
 import csharp
 private import DataFlow

csharp/ql/lib/semmle/code/asp/AspNet.qll

@@ -3,6 +3,8 @@
  *
  * All ASP.NET elements have the common base class `AspElement`.
  */
+overlay[local?]
+module;
 
 import csharp
 private import semmle.code.csharp.commons.QualifiedName

csharp/ql/lib/semmle/code/asp/WebConfig.qll

@@ -1,6 +1,8 @@
 /**
  * Provides classes and predicates related to ASP.NET Web.config files.
  */
+overlay[local?]
+module;
 
 import csharp
 

csharp/ql/lib/semmle/code/csharp/AnnotatedType.qll

@@ -5,6 +5,8 @@
  * for annotations on the type. Use the corresponding `getAnnotatedType()` predicate to
  * get the annotated type, that includes this additional information.
  */
+overlay[local?]
+module;
 
 import csharp
 private import TypeRef