Default to LS_INFO logging for release builds.

Increases default loglevel for test targets to LS_INFO, which is a no-op
for debug builds but increases logging on release builds.

This is to present better debug info on buildbots when test runs fail.

BUG=
R=henrikg@webrtc.org, kjellander@webrtc.org, stefan@webrtc.org

Review URL: https://codereview.webrtc.org/1479183002 .

Cr-Commit-Position: refs/heads/master@{#10826}
diff --git a/webrtc/base/macutils.cc b/webrtc/base/macutils.cc
index 6e436d4..7b1ff47 100644
--- a/webrtc/base/macutils.cc
+++ b/webrtc/base/macutils.cc
@@ -191,10 +191,10 @@
     AECreateDesc(typeNull, NULL, 0, &result_data);
     OSAScriptError(component, kOSAErrorMessage, typeChar, &result_data);
     int len = AEGetDescDataSize(&result_data);
-    char* data = (char*) malloc(len);
+    char* data = (char*)malloc(len);
     if (data != NULL) {
       err = AEGetDescData(&result_data, data, len);
-      LOG(LS_ERROR) << "Script error: " << data;
+      LOG(LS_ERROR) << "Script error: " << std::string(data, len);
     }
     AEDisposeDesc(&script_desc);
     AEDisposeDesc(&result_data);