Torch: Update license string

A lot of people have contributed to the Torch app
and it has gone through several UI changes, but we
can't list everybody here (that's why we have git history)

Modify the license string to something more generic.

Change-Id: Id974fee917d55254992a5f15c893ae64651e84d3
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Torch into kitkat