Added simplest test for @KotlinSignature parsing.

compiler/testData/readJavaBinaryClass/kotlinSignature/MethodWithAlternativeSignature.java

@@ -0,0 +1,12 @@
+package test;
+
+import java.lang.UnsupportedOperationException;
+import java.util.*;
+import jet.runtime.typeinfo.KotlinSignature;
+
+public class MethodWithAlternativeSignature {
+    @KotlinSignature("fun foo(a : String, b : List<Map.Entry<String?, String>?>) : String")
+    public String foo(String a, List<Map.Entry<String, String>> b) {
+        throw new UnsupportedOperationException();
+    }
+}

compiler/testData/readJavaBinaryClass/kotlinSignature/MethodWithAlternativeSignature.kt

@@ -0,0 +1,7 @@
+package test
+
+import java.util.*
+
+public open class MethodWithAlternativeSignature : Object() {
+    open fun foo(p0 : String, p1 : List<Map.Entry<String?, String>?>) : String = ""
+}

compiler/testData/readJavaBinaryClass/kotlinSignature/MethodWithAlternativeSignature.txt

@@ -0,0 +1,6 @@
+namespace test
+
+open class test.MethodWithAlternativeSignature : java.lang.Object {
+    final /*constructor*/ fun <init>(): test.MethodWithAlternativeSignature
+    open fun foo(/*0*/ p0: jet.String, /*1*/ p1: java.util.List<java.util.Map.Entry<jet.String?, jet.String>?>): jet.String
+}