Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/loadJava/compiledKotlin/visibility/PropertyInConstructorExplicitVisibility.txt

@@ -18,4 +18,4 @@ internal final class Child : test.Base {
         public open override /*1*/ fun <get-prot>(): kotlin.Int
     public open override /*1*/ val pub: kotlin.Int
         public open override /*1*/ fun <get-pub>(): kotlin.Int
-}
+}