cros_generate_breakpad_symbols: Output the # of errors encountered.
cros_generate_breakpad_symbols: Output the # of errors encountered.

This is a straightforward change- the intent is to up the debug
information available so we can deal w/ crashes like:

http://chromegw.corp.google.com/i/chromeos/builders/x86-alex32%20canary/builds/56

BUG=None
TEST=# Manual inducing of failures.

Change-Id: Ibea75d1467160fc7f07c21235d701692cec96d05
Reviewed-on: https://gerrit.chromium.org/gerrit/21931
Reviewed-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Tested-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Commit-Ready: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>

gtank/scripts,endocode/scripts,smilart/scripts,coreos/scripts,sigma/coreos-scripts,endocode/scripts,zhang0137/scripts,vmware/coreos-scripts,BugRoger/scripts,BugRoger/scripts,marineam/coreos-scripts,glevand/coreos--scripts,nicescale/scripts,mischief/scripts,sigma/coreos-scripts,crawford/scripts,trnubo/scripts,marineam/coreos-scripts,smilart/scripts,trnubo/scripts,fivethreeo/scripts,vmware/coreos-scripts,mjg59/scripts,crawford/scripts,trnubo/scripts,andrejro/coreos--scripts,glevand/coreos--scripts,zhang0137/scripts,coreos/scripts,bcwaldon/coreos-scripts,marineam/coreos-scripts,nicescale/scripts,mischief/scripts,fivethreeo/scripts,mischief/scripts,sigma/coreos-scripts,bcwaldon/coreos-scripts,vmware/coreos-scripts,gtank/scripts,nicescale/scripts,andrejro/coreos--scripts,crawford/scripts,BugRoger/scripts,zhang0137/scripts,smilart/scripts,endocode/scripts,fivethreeo/scripts,mjg59/scripts,andrejro/coreos--scripts,gtank/scripts,bcwaldon/coreos-scripts,mjg59/scripts