Update copyrights to 2015

compiler/testData/psi/CommentsBinding.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2014 JetBrains s.r.o.
+ * Copyright JetBrains s.r.o.
  */
 package foo.bar // package directive
 

compiler/testData/psi/CommentsBinding.txt

@@ -1,5 +1,5 @@
 JetFile: CommentsBinding.kt
-  PsiComment(BLOCK_COMMENT)('/*\n * Copyright 2010-2014 JetBrains s.r.o.\n */')
+  PsiComment(BLOCK_COMMENT)('/*\n * Copyright JetBrains s.r.o.\n */')
   PsiWhiteSpace('\n')
   PACKAGE_DIRECTIVE
     PsiElement(package)('package')