Fix a linker test by adding support for 'invokeMethodRef' dep.

pkg/analyzer/lib/src/summary/link.dart

Index: pkg/analyzer/lib/src/summary/link.dart
diff --git a/pkg/analyzer/lib/src/summary/link.dart b/pkg/analyzer/lib/src/summary/link.dart
index 5a8ff1eab6ab430fe50ea353f2180bcb0a04ae2c..18960c0489e0a7c1cf73eb2fa1e41bf7e512f26e 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -1290,6 +1290,7 @@ abstract class ConstNode extends Node<ConstNode> {
     for (UnlinkedConstOperation operation in unlinkedConst.operations) {
       switch (operation) {
         case UnlinkedConstOperation.pushReference:
+        case UnlinkedConstOperation.invokeMethodRef:
           EntityRef ref = unlinkedConst.references[refPtr++];
           ConstVariableNode variable =
               compilationUnit._resolveRef(ref.reference).asConstVariable;