Only subtract image base on win64
Only subtract image base on win64

jcranmer/mcsema,jcranmer/mcsema,trailofbits/mcsema,jcranmer/mcsema,chubbymaggie/mcsema,trailofbits/mcsema,trailofbits/mcsema,alessandrogario/mcsema,alessandrogario/mcsema,chubbymaggie/mcsema,chubbymaggie/mcsema,chubbymaggie/mcsema,alessandrogario/mcsema,alessandrogario/mcsema,trailofbits/mcsema,jcranmer/mcsema