Upstream-Status:Inappropriate [embedded specific]

fix the below error:
configure: error: cannot run test program while cross compiling

Signed-off-by: Chunrong Guo <B40290@freescale.com>

--- a/m4/sf.m4old	2013-08-30 04:08:18.768409680 -0500
+++ b/m4/sf.m4	2013-08-30 04:09:24.591367890 -0500
@@ -135,19 +135,6 @@
         exit 1
     fi
     AC_MSG_CHECKING([for libpcap version >= $1])
-    AC_RUN_IFELSE(
-    [AC_LANG_PROGRAM(
-    [[
-    #include <pcap.h>
-    #include <string.h>
-    extern char pcap_version[];
-    ]],
-    [[
-        if (strcmp(pcap_version, $1) < 0)
-            return 1;
-    ]])],
-    [libpcap_version_1x="yes"],
-    [libpcap_version_1x="no"])
     if test "x$libpcap_version_1x" = "xno"; then
         AC_MSG_RESULT(no)
         echo