Avoid using expat's m4 files

Upstream-Status: Inappropriate [Other]
Workaround specific to our build system.

Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Scott Garman <scott.a.garman@intel.com>

Updated to apply over expat 2.1.0

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>

diff -Nurd expat-2.1.0/configure.in expat-2.1.0/configure.in
--- expat-2.1.0/configure.ac	2012-03-04 01:45:53.000000000 +0200
+++ expat-2.1.0/configure.ac	2012-05-10 21:04:44.000000000 +0300
@@ -51,8 +51,6 @@
 
 AC_CONFIG_HEADER(expat_config.h)
 
-sinclude(conftools/ac_c_bigendian_cross.m4)
-
 AC_LIBTOOL_WIN32_DLL
 AC_PROG_LIBTOOL