[libclang] Add tests for indexing modules and PCHs using modules.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165732 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 9424d43..97d5751 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -2137,7 +2137,7 @@
   index_data = (IndexData *)client_data;
   clang_indexLoc_getFileLocation(loc, &file, 0, &line, &column, 0);
   if (line == 0) {
-    printf("<null loc>");
+    printf("<invalid>");
     return;
   }
   if (!file) {