libxml2: upgrade to 2.9.2

- Rebase python-sitepackages-dir.patch to 2.9.2

- Drop libxml2-CVE-2014-3660.patch which has been merged to 2.9.2.

- Add configure.ac-fix-cross-compiling-warning.patch to fix cross
  compilation failure.

- Tweak do_configure_prepend, use configure.ac to instead of configure.in

- Add cmake files to ${PN}-dev

(From OE-Core rev: 06f555fa5a36dbf63b26c3734dbbd0b5af16dc33)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/libxml/libxml2/python-sitepackages-dir.patch

@@ -4,12 +4,18 @@ The python binary used when building for nativesdk doesn't give us the
 correct path here so we need to be able to specify it ourselves.
 
 Upstream-Status: Inappropriate [config]
-
 Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
 
---- a/configure.in
-+++ b/configure.in
-@@ -743,7 +743,8 @@ dnl
+Rebase to 2.9.2
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ configure.ac | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+--- a/configure.ac
++++ b/configure.ac
+@@ -813,7 +813,8 @@ dnl
  
  PYTHON_VERSION=
  PYTHON_INCLUDES=
@@ -19,3 +25,6 @@ Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
  PYTHON_TESTS=
  pythondir=
  if test "$with_python" != "no" ; then
+-- 
+1.9.1
+