Properly escape $ in DISTCHECK_CONFIGURE_FLAGS.
Properly escape $ in DISTCHECK_CONFIGURE_FLAGS.

	* build-aux/urbi-distcheck-configure-flags.m4
	(distcheck_configure_flags): s/$/$$/g.

aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport