Fix cpufeatures to not parse /proc/self/auxv

Unfortunately, this file is non-readable for regular applications
on recent versions of the platform. This doesn't happen under the
"shell" UID, which is why testing didn't detect that.

http://b.android.com/43055

Change-Id: I09b7780be9ca6666c9b9ba4f81479403585514ea
1 file changed