configure.ac (*-*-dragonfly*): New configuration.

gnattools/
	* configure.ac (*-*-dragonfly*): New configuration.
	* configure: Regenerate.
gcc/ada/
	* a-intnam-dragonfly.ads: New.
	* s-osinte-dragonfly.adb: Likewise.
	* s-osinte-dragonfly.ads: Likewise.
	* system-dragonfly-x86_64.ads: Likewise.
	* adaint.c: Add BSD macros.
	* cstreams.c: Likewise.
	* gsocket.h: Likewise.
	* link.c: Likewise.
	* socket.c: Likewise.
	* env.c: Add __DragonFly__, remove __FreeBSD__ macro.
	* init.c: Add __DragonFly__, change __gnat_install_handler
	prototype from empty to void.
	* initialize.c: Add __DragonFly__.
	* sysdep.c: Likewise.
	* s-osinte-freebsd.adb: Use __get_errno instead of __error.
	* tracebak.c: Set unwinder for i386 BSD.
	* gcc-interface/Makefile.in: Add x86_64 DragonFly, tweak
	x86_64 FreeBSD and x86 FreeBSD.

From-SVN: r224207