Merge "Runtime detection of available processor cores."

diff --cc build/make/configure.sh
Simple merge

diff --cc configure
Simple merge

diff --cc vp8/common/generic/systemdependent.c
Simple merge

diff --cc vp8/common/onyxc_int.h
Simple merge

diff --cc vp8/decoder/threading.c
Simple merge

diff --cc vp8/encoder/ethreading.c
Simple merge

diff --cc vp8/encoder/onyx_int.h
Simple merge