Asciidoc: add it

In order to enable perf man pages for basic 'help' functionality,
it needs to produce man pages for perf, which depends on the xmlto
and asciidoc tools.
So add the asciidoc recipe to help produce man pages for perf and
other commands.

(From OE-Core rev: 1f57ac3b10df184d5ce992297ec0626895174ec9)

Signed-off-by: Dengke Du <dengke.du@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/asciidoc/asciidoc_8.6.9.bb

@@ -0,0 +1,20 @@
+SUMMARY = "Tool for creating HTML, PDF, EPUB, man pages"
+DESCRIPTION = "AsciiDoc is a text document format for writing short documents, \
+articles, books and UNIX man pages."
+
+HOMEPAGE = "http://asciidoc.org/"
+
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://COPYING;md5=8ca43cbc842c2336e835926c2166c28b \
+                    file://COPYRIGHT;md5=029ad5428ba5efa20176b396222d4069"
+
+SRC_URI = "http://downloads.sourceforge.net/project/${BPN}/${BPN}/${PV}/${BP}.tar.gz"
+SRC_URI[md5sum] = "c59018f105be8d022714b826b0be130a"
+SRC_URI[sha256sum] = "78db9d0567c8ab6570a6eff7ffdf84eadd91f2dfc0a92a2d0105d323cab4e1f0"
+
+
+inherit distutils autotools-brokensep
+
+export DESTDIR = "${D}"
+RDEPENDS_${PN} += "python" 
+BBCLASSEXTEND = "native"