m8: Update asserts

 * Installing is a nice thing!
 * Rename sprint to htc_m8whl

Change-Id: Ia2960dba6aa09adff63fb8d83e093256431468df
Merge branch 'cm-12.0' of https://github.com/CyanogenMod/android_device_htc_m8 into lollipop
Merge branch 'lollipop' of github.com:TeamHorizon/android_device_htc_m8 into lollipop