docs: Use <Hn> as Heading elements instead of <DIV class="doc_foo">.

H1 ... doc_title
H2 ... doc_section
H3 ... doc_subsection
H4 ... doc_subsubsection

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129736 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/FAQ.html b/docs/FAQ.html
index ae3a0da..620cf25 100644
--- a/docs/FAQ.html
+++ b/docs/FAQ.html
@@ -12,9 +12,9 @@
 </head>
 <body>
 
-<div class="doc_title">
+<h1>
   LLVM: Frequently Asked Questions
-</div>
+</h1>
 
 <ol>
   <li><a href="#license">License</a>
@@ -138,9 +138,9 @@
 
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
   <a name="license">License</a>
-</div>
+</h2>
 <!-- *********************************************************************** -->
 
 <div class="question">
@@ -189,9 +189,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
   <a name="source">Source Code</a>
-</div>
+</h2>
 <!-- *********************************************************************** -->
 
 <div class="question">
@@ -227,9 +227,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
   <a name="build">Build Problems</a>
-</div>
+</h2>
 <!-- *********************************************************************** -->
 
 <div class="question">
@@ -449,7 +449,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="felangs">Source Languages</a></div>
+<h2>
+  <a name="felangs">Source Languages</a>
+</h2>
 
 <div class="question">
 <p><a name="langs">What source languages are supported?</a></p>
@@ -555,9 +557,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
   <a name="cfe">Using the GCC Front End</a>
-</div>
+</h2>
 
 <div class="question">
 <p>When I compile software that uses a configure script, the configure script
@@ -712,9 +714,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
   <a name="cfe_code">Questions about code generated by the GCC front-end</a>
-</div>
+</h2>
 
 <div class="question">
 <p><a name="iosinit">What is this <tt>llvm.global_ctors</tt> and