Fix Index look due a very long Linux headers entry.

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/new-xsl@8130 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

lfs.css

@@ -264,16 +264,12 @@ li.chapter h4 a {
     float: left;
 }
 
-.lfs .item + .indexref {
-    margin-left: 18em;
+.item + .indexref {
+    margin-left: 31em;
 }
 
-.lfs .secitem + .indexref {
-    margin-left: 17em;
-}
-
-.blfs .indexref {
-    margin-left: 26em;
+.secitem + .indexref {
+    margin-left: 30em;
 }