Upstream-Status: Backport

There is an incorrect m4_define() in configure.in which will result in an
infinite recursion, and it doesn't make sense, since snort 2.9.7 it has been
commented out. We follow this solution to fix it.

Signed-off-by: Zhiquan Li <zhiquan.li@windriver.com>

--- a/configure.in	2015-10-22 13:58:50.743367251 +0800
+++ b/configure.in	2015-10-22 13:59:13.855366117 +0800
@@ -1100,8 +1100,8 @@
 # Define PKG_CHECK_MODULES if it doesnt already exist. 
 #file_ This prevents './configure' from erroring on machines that dont have
 # 'pkgconfig' installed.
-m4_ifdef([PKG_CHECK_MODULES],[], [m4_define([PKG_CHECK_MODULES], 
-     [echo "PKG_CHECK_MODULES not defined"])])
+#m4_ifdef([PKG_CHECK_MODULES],[], [m4_define([PKG_CHECK_MODULES],
+#     [echo "PKG_CHECK_MODULES not defined"])])

 if test "x$enable_rzb_saac" = "xyes"; then
     AC_CHECK_PROG(PKG_CONFIG,pkg-config,yes)