[CVE-2011-2494] Make TASKSTATS require root access

[Andy Whitcroft]

CVE-2011-2494
	taskstats info disclosure

Following this email is a patch for hardy, lucid, lucid/fsl-imx51,
maverick, maverick/ti-omap4, natty, natty/ti-omap4, oneiric, and
oneiric/ti-omap4.  This is a clean cherry-pick from mainline for all
releases.

Proposing for hardy, lucid, lucid/fsl-imx51, maverick, maverick/ti-omap4,
natty, natty/ti-omap4, oneiric, oneiric/ti-omap4

-apw