scripts: Dump symbols for executables that are not user readable
scripts: Dump symbols for executables that are not user readable

If an executable was only readable by root, we would skip it with a "Binary
is not user readable" message because the 'file' command was not running as
root.  This kept us from generating Breakpad symbols for Xorg, which is now
a top crasher for some boards.

BUG=chrome-os-partner:11791
TEST=Manually ran the script on some files

Change-Id: Id8a13c2968223e54cb1f6c5c3211e9bc2ca89057
Reviewed-on: https://gerrit.chromium.org/gerrit/29839
Tested-by: Michael Krebs <d6638659c20694b0807ba6fa35ee0bac2e482e0f@chromium.org>
Reviewed-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Commit-Ready: Michael Krebs <d6638659c20694b0807ba6fa35ee0bac2e482e0f@chromium.org>

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