Fix asciidoc manpage creation.

As reported here, man pages could no longer be built :
http://archlinux.org/pipermail/pacman-dev/2008-December/007726.html

I found the explanation here :
http://www.methods.co.nz/asciidoc/source-highlight-filter.html

"If you use a2x(1) to generate PDF you need to include the --no-xmllint
option to suppress xmllint(1) checking — the programlisting language
attribute (required by the dblatex source highlighter) is not part of the
DocBook 4 specification (but it is in the newer DocBook 5 specification)."

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

doc/Makefile.am

@@ -62,6 +62,7 @@ ASCIIDOC_OPTS = \
 	-a pacman_date="`date +%Y-%m-%d`" \
 	-a sysconfdir=$(sysconfdir)
 A2X_OPTS = \
+	--no-xmllint \
 	-d manpage \
 	-f manpage \
 	--xsltproc-opts='-param man.endnotes.list.enabled 0' \

doc/PKGBUILD.5.txt

@@ -369,11 +369,10 @@ The following is an example PKGBUILD for the 'patch' package. For more
 examples, look through the build files of your distribution's packages. For
 those using Arch Linux, consult the ABS tree.
 
-[sh]
-source~~~~~
+[source,sh]
+-------------------------------
 include::PKGBUILD-example.txt[]
-source~~~~~
-
+-------------------------------
 
 See Also
 --------