C#: Also make the implicitToString test print the type declaring the ToString call being synthesized.

Author: michaelnebel

csharp/ql/test/library-tests/implicittostring/implicitToString.expected

@@ -1,6 +1,6 @@
-| implicitToString.cs:35:27:35:35 | call to method ToString |
-| implicitToString.cs:37:22:37:30 | call to method ToString |
-| implicitToString.cs:39:22:39:30 | call to method ToString |
-| implicitToString.cs:44:23:44:42 | call to method ToString |
-| implicitToString.cs:49:23:49:32 | call to method ToString |
-| implicitToString.cs:52:23:52:32 | call to method ToString |
+| implicitToString.cs:35:27:35:35 | call to method ToString | Container |
+| implicitToString.cs:37:22:37:30 | call to method ToString | Container |
+| implicitToString.cs:39:22:39:30 | call to method ToString | Container |
+| implicitToString.cs:44:23:44:42 | call to method ToString | FormattableContainer |
+| implicitToString.cs:49:23:49:32 | call to method ToString | Container |
+| implicitToString.cs:52:23:52:32 | call to method ToString | Object |

csharp/ql/test/library-tests/implicittostring/implicitToString.ql

@@ -2,4 +2,4 @@ import csharp
 
 from MethodCall c
 where c.isImplicit()
-select c
+select c, c.getTarget().getDeclaringType().toString()