Extending the SSE2 implementation of vp9_subtract_block to work
with the 128x128 coding unit experiment
Change-Id: Ib3cc16bf5801ef2c7eecc19d3cc07a8c50631580
Support for gyp which doesn't support multiple objects in the same
static library having the same basename.
Change-Id: Ib947eefbaf68f8b177a796d23f875ccdfa6bc9dc