Added checking vararg/not vararg in alternative signatures.

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

@@ -0,0 +1,9 @@
+package test
+
+import java.util.*
+
+public open class NotVarargReplacedWithVararg : Object() {
+    public open fun foo(p0 : String?) {
+        throw UnsupportedOperationException()
+    }
+}