Change HTTP link to HTTPS in ChromeOS Debugging Instructions

The ChromeOS debugging instructions include a HTTP link that should be
using HTTPS instead.

TBR=jcivelli@chromium.org

Change-Id: I678027a32b9de592c4d37849c546de265e3e7d48
Reviewed-on: https://chromium-review.googlesource.com/1028659Reviewed-by: Eric Lawrence <elawrence@chromium.org>
Reviewed-by: Jay Civelli <jcivelli@chromium.org>
Commit-Queue: Eric Lawrence <elawrence@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553712}

chrome/app/chromeos_strings.grdp

@@ -2642,7 +2642,7 @@
     <ph name="BR">&lt;br&gt;</ph>
     <ph name="BR">&lt;br&gt;</ph>
     For more information about the debugging features see:<ph name="BR">&lt;br&gt;</ph>
-    http://www.chromium.org/chromium-os/how-tos-and-troubleshooting/debugging-features
+    https://www.chromium.org/chromium-os/how-tos-and-troubleshooting/debugging-features
     <ph name="BR">&lt;br&gt;</ph>
     <ph name="BR">&lt;br&gt;</ph>
     <ph name="BEGIN_BOLD">&lt;b&gt;</ph>Note:<ph name="END_BOLD">&lt;/b&gt;</ph>  The system will reboot during the process.