Enable symbolic backtraces on more Linux and BSD ports (continued)

Enable symbolic backtraces on more Linux and BSD ports (continued)

gcc/ada
	PR ada/117538
	PR ada/117708
	* Makefile.rtl (GNU Hurd): Add $(TRASYM_DWARF_UNIX_PAIRS).
	(x86-64 kfreebsd): Likewise.
	(aarch64 FreeBSD): Likewise.
	(x86-64 DragonFly): Likewise.
	(S390 Linux): Likewise and add Linux version of s-tsmona.adb.
	(Mips Linux): Likewise.
	(SPARC Linux): Likewise.
	(HP/PA Linux): Linux.
	(M68K Linux): Likewise.
	(SH4 Linux): Likewise.
	(Alpha Linux): Likewise.
	(RISC-V Linux): Likewise.