[patch][aarch64-*-*freebsd*] Enable TARGET_DEFAULT_ASYNC_UNWIND_TABLES

[Andreas Tobler]

Hi all,

I have this patch since a longer time in my tree. No obvious fallout 
visible.

I'm going to commit this patch in the next days if no one objects.

TIA,
Andreas

2018-12-12  Andreas Tobler  <andreast@gcc.gnu.org>

	* config.gcc: Enable TARGET_DEFAULT_ASYNC_UNWIND_TABLES on
	aarch64*-*-freebsd*.


Index: gcc/config.gcc
===================================================================
--- gcc/config.gcc	(revision 267063)
+++ gcc/config.gcc	(working copy)
@@ -1012,6 +1012,7 @@
  	tm_file="${tm_file} dbxelf.h elfos.h ${fbsd_tm_file}"
  	tm_file="${tm_file} aarch64/aarch64-elf.h aarch64/aarch64-freebsd.h"
  	tmake_file="${tmake_file} aarch64/t-aarch64 aarch64/t-aarch64-freebsd"
+	tm_defines="${tm_defines}  TARGET_DEFAULT_ASYNC_UNWIND_TABLES=1"
  	;;
  aarch64*-*-linux*)
  	tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h"