use quotes for local headers

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I95f247bd17cffab8b9ef3337f48336f8d7059c2d
diff --git a/src/Utils.cpp b/src/Utils.cpp
index f7a2ebe..833b141 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -14,7 +14,8 @@
 // limitations under the License.
 */
 
-#include <Utils.hpp>
+#include "Utils.hpp"
+
 #include <boost/algorithm/string/predicate.hpp>
 #include <filesystem>
 #include <fstream>