bin_descend: Add comments specifying the most common calling conventions for 'C' and 'E'.
bin_descend: Add comments specifying the most common calling conventions for 'C' and 'E'.

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