Makefile.def: Make all-gcc depend on all-libbacktrace.

Makefile.def: Make all-gcc depend on all-libbacktrace.

./:	* Makefile.def: Make all-gcc depend on all-libbacktrace.
	* Makefile.in: Rebuild.
gcc/:
	* diagnostic.c: Include "demangle.h" and "backtrace.h".
	(bt_stop): New static array.
	(bt_callback, bt_err_callback): New static functions.
	(diagnostic_action_after_output): Call backtrace_full for DK_ICE.
	* Makefile.in (BACKTRACE): New variable.
	(BACKTRACEINC, LIBBACKTRACE): New variables.
	(BACKTRACE_H): New variable.
	(LIBDEPS, LIBS): Add $(LIBBACKTRACE).
	(INCLUDES): Add $(BACKTRACEINC).
	(diagnostic.o): Depend upon $(DEMANGLE_H) and $(BACKTRACE_H).

From-SVN: r191757