Put the final output of dev_debug_vboot under /var/log/

Change-Id: Id34b2a8cf2fa6940b73f11de3b8817477f4e001b

R=jimhebert@chromium.org,gauravsh@chromium.org
BUG=chromium-os:8947
TEST=manual

Boot, wait 60 seconds, navigate to chrome://system.
Click the "Expand" button for "verified boot".
You should see useful information.

Review URL: http://codereview.chromium.org/6835010
diff --git a/etc/sys_log_utils.lst b/etc/sys_log_utils.lst
index 8507827..5c29f78 100755
--- a/etc/sys_log_utils.lst
+++ b/etc/sys_log_utils.lst
@@ -43,5 +43,5 @@
 ui_log,/usr/share/userfeedback/scripts/get_log /var/log/ui/ui.LATEST
 uname,/bin/uname -a
 update_engine.log,cat $(ls -1tr /var/log/update_engine | tail -5 | sed s.^./var/log/update_engine/.) | /usr/share/userfeedback/scripts/get_log /dev/stdin 2000
-verified boot,/usr/share/userfeedback/scripts/get_log /tmp/debug_vboot_noisy.log
+verified boot,/usr/share/userfeedback/scripts/get_log /var/log/debug_vboot_noisy.log
 vpd_2.0,/usr/share/userfeedback/scripts/get_log /var/log/vpd_2.0.txt