Added check for extra and missing upper bounds in alternative signatures.

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

@@ -0,0 +1,9 @@
+package test
+
+import java.util.*
+
+public open class ExtraUpperBound : Object() {
+    public open fun <A : Runnable?> foo() : String? {
+        throw UnsupportedOperationException()
+    }
+}