Added support to use logo key as home button when logo2menu value is set to 2.

Remapping existing home button to menu or multitasking still needs some work, but button remapping apps might work for now. If someone could test this that would be great, since I don't actually have an HTC One, but I plan on getting one soon. Although, this is a pretty simple mod, so I'm pretty sure it will work.

I'm guessing that remapping the hardware buttons would have to be done via a ROM modification rather than a kernel modification, but this at least allows for ROMs to enable a Back - Home - Menu/Multitask layout. Again, not sure it this works with the existing HTC features like double tap home to multitask, but I'm guessing it ***should*** work.