8043643: Add an crules analyzer avoiding string concatenation in messages of Assert checks

Generalizing the crules infrastructure, adding a new analyzer to check String concatenation in Assert calls.

Reviewed-by: jjg, vromero

langtools/make/test/crules/CodingRulesAnalyzerPlugin/Test.java

@@ -0,0 +1,11 @@
+/**@test /nodynamiccopyright/
+ * @compile/fail/ref=Test.out -Xplugin:coding_rules -XDrawDiagnostics Test.java
+ */
+
+import com.sun.tools.javac.util.Assert;
+
+public class Test {
+    public void check(String value) {
+        Assert.check(value.trim().length() > 0, "value=" + value);
+    }
+}