Added checking for function name in alternative signature.

compiler/testData/readJavaBinaryClass/kotlinSignature/error/WrongMethodName.java

@@ -0,0 +1,10 @@
+package test;
+
+import jet.runtime.typeinfo.KotlinSignature;
+
+public class WrongMethodName {
+    @KotlinSignature("fun bar() : String")
+    public String foo() {
+        throw new UnsupportedOperationException();
+    }
+}

compiler/testData/readJavaBinaryClass/kotlinSignature/error/WrongMethodName.kt

@@ -0,0 +1,7 @@
+package test
+
+import java.util.*
+
+public open class WrongMethodName : Object() {
+    public open fun foo() : String? = ""
+}

compiler/testData/readJavaBinaryClass/kotlinSignature/error/WrongMethodName.txt

@@ -0,0 +1,6 @@
+namespace test
+
+public open class test.WrongMethodName : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.WrongMethodName
+    public open fun foo(): jet.String?
+}