bind: Update libxml2 check to make it deterministic.

* Firstly configure scritp was testing files from bin folder.
  In our case we don't copy bin folder to sysroot for target
  recipes. So added extra check to validate .pc file from lib
  folder via a patch to configure.in file.
* Secondly linxml2 dependency was missing. So added PACKAGECONFIG
  for libxml2.

(From OE-Core rev: b61a2acc321489c3427f0afa3059486dc144a13b)

Signed-off-by: Noor Ahsan <noor_ahsan@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/bind/bind/bind-add-crosscripts-search-path-for-xml2-config.patch

@@ -0,0 +1,35 @@
+From 8fa549fe5390875d56f75e20d364394cd5ccf388 Mon Sep 17 00:00:00 2001
+From: Joe MacDonald <joe_macdonald@mentor.com>
+Date: Mon, 3 Nov 2014 21:52:02 -0500
+Subject: [PATCH] bind: add crosscripts search path for xml2-config
+
+The configure script was testing xml2-config from bin but in openembedded
+bin folder is not copied to sysroot so the test was failing. Added another 
+condition to test libxml-2.0.pc which is present in lib folder. Used pkg-config
+to get libs and cflags information.
+
+Upstream-Status: Inappropriate [ openembedded specific ]
+
+Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
+Signed-off-by: Noor Ahsan <noor_ahsan@mentor.com>
+---
+ configure.in | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/configure.in b/configure.in
+index 3d04f4c..6032f67 100644
+--- a/configure.in
++++ b/configure.in
+@@ -1433,6 +1433,9 @@ case "$use_libxml2" in
+ 		if test -f "$use_libxml2/bin/xml2-config" ; then
+ 			libxml2_libs=`$use_libxml2/bin/xml2-config --libs`
+ 			libxml2_cflags=`$use_libxml2/bin/xml2-config --cflags`
++		elif test -f "$use_libxml2/lib/pkgconfig/libxml-2.0.pc" ; then
++			libxml2_libs=`pkg-config libxml-2.0 --libs`
++			libxml2_cflags=`pkg-config libxml-2.0 --cflags`
+ 		fi
+ 		;;
+ esac
+-- 
+1.9.1
+

meta/recipes-connectivity/bind/bind_9.9.5.bb

@@ -18,6 +18,7 @@ SRC_URI = "ftp://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.gz \
            file://bind9 \
            file://init.d-add-support-for-read-only-rootfs.patch \
            file://bind9_9_5-CVE-2014-8500.patch \
+           file://bind-add-crosscripts-search-path-for-xml2-config.patch \
 	   "
 
 SRC_URI[md5sum] = "e676c65cad5234617ee22f48e328c24e"
@@ -29,10 +30,14 @@ EXTRA_OECONF = " ${ENABLE_IPV6} --with-randomdev=/dev/random --disable-threads \
                  --disable-devpoll --disable-epoll --with-gost=no \
                  --with-gssapi=no --with-ecdsa=yes \
                  --sysconfdir=${sysconfdir}/bind \
-                 --with-openssl=${STAGING_LIBDIR}/.. --with-libxml2=${STAGING_LIBDIR}/.. \
+                 --with-openssl=${STAGING_LIBDIR}/.. \
                  --enable-exportlib --with-export-includedir=${includedir} --with-export-libdir=${libdir} \
                "
-inherit autotools-brokensep update-rc.d systemd useradd
+inherit autotools-brokensep update-rc.d systemd useradd pkgconfig
+
+PACKAGECONFIG ?= "libxml2"
+
+PACKAGECONFIG[libxml2] = "--with-libxml2=${STAGING_LIBDIR}/..,--with-libxml2=no,libxml2"
 
 USERADD_PACKAGES = "${PN}"
 USERADD_PARAM_${PN} = "--system --home /var/cache/bind --no-create-home \