Add GCC 64-bit SSE2 scaling for black/white. Disabled Win32 assembler since it doesn't work properly.
Add GCC 64-bit SSE2 scaling for black/white.
Disabled Win32 assembler since it doesn't work properly.

git-svn-id: 04e88ac4940b0408b73cd6f458a224a262abaaff@148 ec705bc8-faf6-4f9b-9aff-b4916e9bedc3

jbuchbinder/rawspeed,jbuchbinder/rawspeed