Adds new ARMv6 optimized function vp8_fast_quantize_b_armv6 to the encoder. Change-Id: I40277ec8f82e8a6cbc453cf295a0cc9b2504b21e
it's difficult to mux the *_offsets.c files because of header conflicts. make three instead, name them consistently and partititon the contents to allow building them as required. Change-Id: I8f9768c09279f934f44b6c5b0ec363f7943bb796