uprof: Add the units in the name of the "Per Frame" timer attribute
uprof: Add the units in the name of the "Per Frame" timer attribute

So it shows up in the profile report. Take the opportunity to write a
better long description for the attribute.

https://bugzilla.gnome.org/show_bug.cgi?id=654363

spatulasnout/clutter,GNOME/clutter,Distrotech/clutter,GNOME/clutter,djdeath/clutter-android,djdeath/clutter,djdeath/clutter,djdeath/clutter,heysion/clutter-clone,collects/clutter,GNOME/clutter,Distrotech/clutter,collects/clutter,ebassi/clutter,jigpu/clutter,collects/clutter,djdeath/clutter-multithreaded,jigpu/clutter,djdeath/clutter,spatulasnout/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala,heysion/clutter-clone,collects/clutter,jigpu/clutter,heysion/clutter-clone,GNOME/clutter,djdeath/clutter-android,Distrotech/clutter,spatulasnout/clutter,collects/clutter,heysion/clutter-clone,ebassi/clutter,jigpu/clutter,jigpu/clutter,djdeath/clutter-android,ebassi/clutter,ebassi/clutter,jigpu/clutter,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,GNOME/clutter,heysion/clutter-clone,djdeath/clutter-multithreaded,djdeath/clutter,djdeath/clutter-multithreaded,spatulasnout/clutter,spatulasnout/clutter,Distrotech/clutter,Distrotech/clutter,ebassi/clutter,kerrickstaley/clutter-vala,djdeath/clutter,Distrotech/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala