DLL name has changed so installperl needs to know

(Why isn't it working it out or passed it?)

p4raw-id: //depot/perlio@9455

diff --git a/installperl b/installperl
index 4afd0a6..ae55ff3 100755 (executable)
--- a/installperl
+++ b/installperl
@@ -192,7 +192,7 @@ if ($Is_W32 or $Is_Cygwin) {
       };
     };
   } else {
-    $perldll = 'perl56.' . $dlext;
+    $perldll = 'perl57.' . $dlext;
   }
 
   if ($dlsrc ne "dl_none.xs") {