crash-sender: set timeout to 4 hours

A single run of crash_sender might take some time to upload a report
(if the connection is pretty slow).  Give the system 4 hours to upload
at least one report.

BUG=chromium:377981
TEST=`cbuildbot x86-generic-full` passes
CQ-DEPEND=CL:201719

Change-Id: I4d3870b961653c7f0ca85e1015f371919125e846
Reviewed-on: https://chromium-review.googlesource.com/201404
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>

init/crash-sender.conf

diff --git a/init/crash-sender.conf b/init/crash-sender.conf
index 25ad2f8..892186f 100644
--- a/init/crash-sender.conf
+++ b/init/crash-sender.conf
@@ -8,4 +8,4 @@
 start on starting system-services
 stop on stopping system-services
 
-exec periodic_scheduler 3600 crash_sender /sbin/crash_sender
+exec periodic_scheduler 3600 14400 crash_sender /sbin/crash_sender