hammerhead: Update build fingerprint and description to KOT49H

Fingerprint taken from OTA patch

Change-Id: Ibe628d462975afab7c59552dc66b3784d1fb2a22
Add support for USB OTG

Change-Id: Id5ded1d14f01e4bd126115866e0bf3bd75d5cfcb
hammerhead: Update cpufreq settings

 * QC is switching to interactive. We will too.

Change-Id: I1ea4bdc75108136aa4b96e91da1a661b0b5d2b07
hammerhead: Use cyanogenmod_hammerhead_defconfig

Change-Id: Icd5b2bcce022ba6eb1680b2a75930979c91b698a
audio_effects: Add stereowide effect

Change-Id: I5238369a4b04d0061b51313a99edb05932fc927b