Fixes issue 1482
Fixes issue 1482

Mark packed subtraction (OP_psubq, OP_subps, OP_subpd) with self as
always defined, as some hand-coded assembly uses such constructs to
zero out registers.

SVN-Revision: 1809

sigma-random/drmemory,code4bones/drmemory,code4bones/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,sigma-random/drmemory