+ do do_consttovar optimization on i386 as well

compiler/i386/cpuinfo.pas

@@ -182,7 +182,7 @@ Const
 
    level1optimizerswitches = genericlevel1optimizerswitches;
    level2optimizerswitches = genericlevel2optimizerswitches + level1optimizerswitches +
-     [{$ifndef llvm}cs_opt_regvar,{$endif}cs_opt_stackframe,cs_opt_tailrecursion,cs_opt_nodecse];
+     [{$ifndef llvm}cs_opt_regvar,{$endif}cs_opt_stackframe,cs_opt_tailrecursion,cs_opt_nodecse,cs_opt_consts];
    level3optimizerswitches = genericlevel3optimizerswitches + level2optimizerswitches;
    level4optimizerswitches = genericlevel4optimizerswitches + level3optimizerswitches + [cs_useebp];