Do not add symbol table in ar utility

Xcode 26.4 and later enabled symbol table generation by default,
this causes ar to ignore all non-macho files leaving only SYMDEF entry
and results in corrupted archive.

Author: danpashin

lib/fpm/util.rb

@@ -250,7 +250,7 @@ def ar_cmd
       end
     end
     # If no combination of ar and options omits timestamps, fall back to default.
-    @@ar_cmd = ["ar", "-qc"]
+    @@ar_cmd = ["ar", "-qcS"]
     FileUtils.rm_f([testarchive, emptyfile])
     return @@ar_cmd
   end # def ar_cmd