[nesc] Use --enable-m4_pattern_allow

[Christopher Meng]

commit 9ec0e7d17fda02988ac29fde7cab5c1d4501c88e
Author: Christopher Meng <i at cicku.me>
Date:   Wed Jul 2 22:14:37 2014 +0800

    Use --enable-m4_pattern_allow

 nesc.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/nesc.spec b/nesc.spec
index b1c63bd..a1f4ecd 100644
--- a/nesc.spec
+++ b/nesc.spec
@@ -72,7 +72,7 @@ package to use %{pkgname} with GNU Emacs.
 
 %build
 autoreconf -fiv
-%configure
+%configure --enable-m4_pattern_allow
 %make_build
 
 %if 0%{?fedora}