Add character encoding declaration to fix verification warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68440 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/DeveloperPolicy.html b/docs/DeveloperPolicy.html
index 987b622..de46ccd 100644
--- a/docs/DeveloperPolicy.html
+++ b/docs/DeveloperPolicy.html
@@ -2,6 +2,7 @@
                       "http://www.w3.org/TR/html4/strict.dtd">
 <html>
 <head>
+  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
   <title>LLVM Developer Policy</title>
   <link rel="stylesheet" href="llvm.css" type="text/css">
 </head>