m68k-atari: reenable threading feature. even if it's technically unsupported, it breaks the build of too many otherwise applicable packages

git-svn-id: trunk@37033 -

compiler/options.pas

@@ -3145,8 +3145,6 @@ begin
       target_unsup_features:=[f_heap,f_textio,f_consoleio,f_fileio,
          f_variants,f_objects,f_commandargs,
          f_processes,f_stackcheck,f_dynlibs,f_softfpu,f_objectivec1,f_resources];
-    system_m68k_atari:
-      target_unsup_features:=[f_threading];
     system_m68k_palmos:
       target_unsup_features:=[f_threading];
     else