Add space to asoutflag value where appropriate

Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5534)

Configurations/10-main.conf

@@ -9,7 +9,7 @@ sub vc_win64a_info {
             $vc_win64a_info = { AS        => "nasm",
                                 ASFLAGS   => "-g",
                                 asflags   => "-Ox -f win64 -DNEAR",
-                                asoutflag => "-o" };
+                                asoutflag => "-o " };
         } elsif ($disabled{asm}) {
             $vc_win64a_info = { AS        => "ml64",
                                 ASFLAGS   => "/Zi",
@@ -35,7 +35,7 @@ sub vc_win32_info {
             $vc_win32_info = { AS        => $ver ge $vew ? "nasm" : "nasmw",
                                ASFLAGS   => "",
                                asflags   => "-f win32",
-                               asoutflag => "-o",
+                               asoutflag => "-o ",
                                perlasm_scheme => "win32n" };
         } elsif ($disabled{asm}) {
             $vc_win32_info = { AS        => "ml",
@@ -159,7 +159,7 @@ sub vms_info {
                 $vms_info->{AS} = "ias";
                 $vms_info->{ASFLAGS} = '-d debug';
                 $vms_info->{asflags} = '"-N" vms_upcase';
-                $vms_info->{asoutflag} = "-o";
+                $vms_info->{asoutflag} = "-o ";
                 $vms_info->{perlasm_scheme} = "ias";
             }
         }