libstrophe: fix detection of libxml2

This commit adds a patch to libstrophe to fix a typo that prevented a
proper detection of libxml2. This patch has been submitted upstream,
see https://github.com/metajack/libstrophe/pull/46.

Fixes:

 http://autobuild.buildroot.org/results/499/499ffd50ec58b54343d6606c0f1bf7cd04f14e1c/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libstrophe/libstrophe-02-configure.ac-fix-misdetection-of-libxml2.patch

@@ -0,0 +1,32 @@
+From 816df67088fc590c9e8f8598a1a7e90ff1fc425d Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Sun, 20 Apr 2014 21:07:41 +0200
+Subject: [PATCH] configure.ac: fix misdetection of libxml2
+
+A small typo in the detection of libxml2 leads to a successful
+pkg-config discovery of libxml2 to be ignored. As a consequence,
+configure.ac falls back to detecting the host libxml2, which does not
+work in cross-compilation situation. This commit fixes this small
+typo.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index e4f9299..a3e48ee 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -16,7 +16,7 @@ AC_ARG_WITH([libxml2],
+ if test "x$with_libxml2" != xno; then
+   PKG_CHECK_MODULES([libxml2], [libxml-2.0 >= 2.7],
+                     [with_libxml2=yes], [dummy=1])
+-  if test "x$with_libxml2" != yes; then
++  if test "x$with_libxml2" != xyes; then
+     old_CFLAGS=$CFLAGS
+     CFLAGS="-I /usr/include/libxml2"
+     AC_CHECK_HEADER([libxml/parser.h],
+-- 
+1.9.2
+