Bump version to 10.1.1-RC0

This should've been done almost 2 months ago when we cut 10.1.0...

Change-Id: I628d688cddb6d5cb48f1fb97fb834664b47e2053
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_vendor_cm into cm-10.1