Accept x86_64_netbsd system for GNU as

git-svn-id: trunk@20745 -

compiler/x86/agx86att.pas

@@ -336,7 +336,7 @@ interface
             asmcmd : '--64 -o $OBJ $ASM';
             supported_targets : [system_x86_64_linux,system_x86_64_freebsd,
                                  system_x86_64_win64,system_x86_64_embedded,
-                                 system_x86_64_openbsd];
+                                 system_x86_64_openbsd,system_x86_64_netbsd];
             flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
             labelprefix : '.L';
             comment : '# ';