hpux.h (TARGET_INIT_LIBFUNCS): Add undef.

	* config/ia64/hpux.h (TARGET_INIT_LIBFUNCS): Add undef.
	* config/ia64/ia64.h (TARGET_INIT_LIBFUNCS): Add define.
	* config/ia64/ia64.c (ia64_init_libfuncs): New.
	(ia64_hpux_init_libfuncs): Add call to ia64_init_libfuncs.

From-SVN: r79339