Mention libuuid-devel in CentOS build instructions (#1700)

diff --git a/html/doc/build_ngx_pagespeed_from_source.html b/html/doc/build_ngx_pagespeed_from_source.html
index 260c3bb..952994d 100644
--- a/html/doc/build_ngx_pagespeed_from_source.html
+++ b/html/doc/build_ngx_pagespeed_from_source.html
@@ -42,7 +42,7 @@
 <dl>
 <dt><b>RedHat, CentOS, or Fedora</b></dt>
 <dd><pre class="prettyprint lang-sh"
-  >sudo yum install gcc-c++ pcre-devel zlib-devel make unzip</pre>
+  >sudo yum install gcc-c++ pcre-devel zlib-devel make unzip libuuid-devel</pre>
 
 <dt><b>Ubuntu or Debian</b></dt>
 <dd><pre class="prettyprint lang-sh"