[docs] Update HTML pages to refer to CSS in a way that works locally and with Sphinx.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155153 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/SegmentedStacks.html b/docs/SegmentedStacks.html
index 16f5507..052003b 100644
--- a/docs/SegmentedStacks.html
+++ b/docs/SegmentedStacks.html
@@ -2,7 +2,7 @@
 <html>
   <head>
         <title>Segmented Stacks in LLVM</title>
-        <link rel="stylesheet" href="llvm.css" type="text/css">
+        <link rel="stylesheet" href="_static/llvm.css" type="text/css">
         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   </head>