Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/loadJava/compiledKotlin/fromLoadJava/packageLevelObject.txt

@@ -6,4 +6,4 @@ internal object Bar {
     public class object <class-object-for-Bar> : test.Bar {
         /*primary*/ private constructor <class-object-for-Bar>()
     }
-}
+}