[libclang] When printing the diagnostic print it with a new line.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142354 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/c-index-test/c-index-test.c b/tools/c-index-test/c-index-test.c
index 5ebad6f..fb83d20 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -1620,7 +1620,7 @@
 
   str = clang_formatDiagnostic(diag, clang_defaultDiagnosticDisplayOptions());
   cstr = clang_getCString(str);
-  printf("diagnostic: %s", cstr);
+  printf("diagnostic: %s\n", cstr);
   clang_disposeString(str);  
 }