unused declaration: take refs from literals into account (IDEA-172447)

java/java-tests/testData/inspection/deadCode/referenceFromReflection/expected.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems>  
+</problems>
+

java/java-tests/testData/inspection/deadCode/referenceFromReflection/src/Test.java

@@ -0,0 +1,7 @@
+class Util {
+    static void foo() { }
+
+    public static void main(String[] args) throws Throwable {
+        Util.class.getMethod("foo");
+    }
+}