Added test with syntax error in alternative signature annotation.

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

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