crash-reporter: Add diagnostics to help diagnose failures in the wild

crash_reporter_logs.conf

Index: crash_reporter_logs.conf
diff --git a/crash_reporter_logs.conf b/crash_reporter_logs.conf
index 5ae82a21ddc3616c91bf3c776276d9d320c7fb82..12fe3ceb5abc3a8d6fe861fa1cf721e6421588cc 100644
--- a/crash_reporter_logs.conf
+++ b/crash_reporter_logs.conf
@@ -17,6 +17,11 @@
 #
 update_engine:cat $(ls -1tr /var/log/update_engine | tail -5 | sed s.^./var/log/update_engine/.) | tail -c 50000
 
+# The following rule is used for generating additional diagnostics when
+# collection of user crashes fails.  This output should not be too large
+# as it is stored in memory.
+crash_reporter-user-collection:echo "===ps output==="; ps auxw | tail -c 25000; echo "===dmesg output==="; dmesg | tail -c 25000; echo "===meminfo==="; cat /proc/meminfo
+
 # The following rules are only for testing purposes.
 crash_log_test:echo hello world
 crash_log_recursion_test:sleep 1 && /home/autotest/tests/crash_log_recursion_test