Use reference instead of copy in ASAN options constructor

Author: kswiecicki

source/loader/layers/sanitizer/asan_options.hpp

@@ -98,7 +98,7 @@ struct AsanOptions {
 
         auto KV = OptionsEnvMap->find("quarantine_size_mb");
         if (KV != OptionsEnvMap->end()) {
-            auto Value = KV->second.front();
+            const auto &Value = KV->second.front();
             try {
                 auto temp_long = std::stoul(Value);
                 if (temp_long > UINT32_MAX) {
@@ -129,7 +129,7 @@ struct AsanOptions {
 
         KV = OptionsEnvMap->find("max_redzone");
         if (KV != OptionsEnvMap->end()) {
-            auto Value = KV->second.front();
+            const auto &Value = KV->second.front();
             try {
                 MaxRZSize = std::stoul(Value);
                 if (MaxRZSize > 2048) {