docs: Fix some in-package URLs.

(eg. trim http://llvm.org/docs/foo -> foo)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129182 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/index.html b/docs/index.html
index b8649e0..f0bd103 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -75,7 +75,7 @@
 <li><a href="DeveloperPolicy.html">Developer Policy</a> - The LLVM project's
 policy towards developers and their contributions.</li>
 
-<li><a href="/docs/CommandGuide/index.html">LLVM Command Guide</a> - A reference
+<li><a href="CommandGuide/index.html">LLVM Command Guide</a> - A reference
 manual for the LLVM command line utilities ("man" pages for LLVM tools).<br>
 Current tools:
  <a href="/cmds/llvm-ar.html">llvm-ar</a>,