parser: make postfix operators primary-exps.
parser: make postfix operators primary-exps.

	* src/parser/ugrammar.y: More postfix ++ and -- from bitor-exp to
	primary-exp, so that "a++.print" is valid.

aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi