Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/compileKotlinAgainstCustomBinaries/missingEnumReferencedInAnnotationArgument/missingEnumReferencedInAnnotationArgument.txt

@@ -11,4 +11,4 @@ test.Anno(e = Unresolved enum entry: test/E.ENTRY: [ERROR : Unresolved enum entr
 
 internal final class Subclass : test.Class {
     public constructor Subclass()
-}
+}

compiler/testData/compileKotlinAgainstCustomBinaries/sameLibraryTwiceInClasspath/sameLibraryTwiceInClasspath.txt

@@ -3,4 +3,4 @@ package test
 internal val inn3r: testing.Outer.Inner
 internal val nested: testing.Outer.Nested
 internal val outer: testing.Outer
-internal val testObjectProperty: testing.TopLevelObject
+internal val testObjectProperty: testing.TopLevelObject