File fix-doc-build-on-SLE11SP3.diff of Package btrfsprogs

Build on SLE11SP3 complains:

ERROR: btrfs-mount.xml.tmp1: line 9: second section must be named SYNOPSIS


Index: btrfs-progs-v3.17.1/Documentation/btrfs-mount.txt
===================================================================
--- btrfs-progs-v3.17.1.orig/Documentation/btrfs-mount.asciidoc
+++ btrfs-progs-v3.17.1/Documentation/btrfs-mount.asciidoc
@@ -5,6 +5,10 @@ NAME
 ----
 btrfs-mount - mount options and supported file attributes for the btrfs filesystem
 
+SYNOPSIS
+--------
+*man btrfs*
+
 DESCRIPTION
 -----------
 This document describes mount options specific to the btrfs filesystem.