Add '\n' to the end of error message.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76506 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/index-test/index-test.cpp b/tools/index-test/index-test.cpp
index 9f02c22..8fd871d 100644
--- a/tools/index-test/index-test.cpp
+++ b/tools/index-test/index-test.cpp
@@ -146,7 +146,7 @@
 
   Decl *D = ASTLoc.getReferencedDecl();
   if (D == 0) {
-    llvm::errs() << "Error: Couldn't get a referenced Decl for the ASTLocation";
+    llvm::errs() << "Error: Couldn't get referenced Decl for the ASTLocation\n";
     HadErrors = true;
     return;
   }