[4.1] 7419397 fix typo: actually save LIBS in save_LIBS

[PÃ¥l Hermunn Johansen]

commit 7419397b8fb8d507b890181496dcdd912357a097
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Aug 22 14:56:58 2016 +0200

    fix typo: actually save LIBS in save_LIBS

diff --git a/configure.ac b/configure.ac
index 0c90d69..7a0a7de 100644
--- a/configure.ac
+++ b/configure.ac
@@ -161,7 +161,7 @@ if test "$enable_pcre_jit" = yes; then
   AC_MSG_CHECKING(for PCRE JIT usability)
   save_CFLAGS="${CFLAGS}"
   CFLAGS="${PCRE_CFLAGS}"
-  save_LIBS="${CFLAGS}"
+  save_LIBS="${LIBS}"
   LIBS="${PCRE_LIBS}"
   AC_RUN_IFELSE(
     [AC_LANG_PROGRAM([[