BannedFilesTest: Add testNoRootCmdSocket

Test for known sockets that allow any users to execute
commands as root.

CVE-2014-1600
https://plus.google.com/+JustinCaseAndroid/posts/e1r6c9Z9jgg
CVE-2013-4777
https://plus.google.com/+JustinCaseAndroid/posts/5ofgPNrSu3J

(cherry picked from commit 6efee00d6fb976bd616ea6c8fe91d4dadda12280)

Signed-off-by: Jon Sawyer <jon@cunninglogic.com>
Change-Id: I245cc517eed79ff1810776021f32d91f807629d6

Conflicts:
	tests/plans/CTS-flaky.xml
1 file changed