COMPMID-2177 Fix clang warnings

Change-Id: I78039db8c58d7b14a042c41e54c25fb9cb509bf7
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1092
Reviewed-by: VidhyaSudhan Loganathan <vidhyasudhan.loganathan@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/framework/printers/PrettyPrinter.cpp b/tests/framework/printers/PrettyPrinter.cpp
index 3181951..fe0540a 100644
--- a/tests/framework/printers/PrettyPrinter.cpp
+++ b/tests/framework/printers/PrettyPrinter.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -111,7 +111,7 @@
 
 void PrettyPrinter::print_list_tests(const std::vector<TestInfo> &infos)
 {
-    for(auto info : infos)
+    for(auto const &info : infos)
     {
         *_stream << "[" << info.id << ", " << info.mode << ", " << info.status << "] " << info.name << "\n";
     }