!8 add buildrequires automake and autoconf

From: @yang_zhuang_zhuang
Reviewed-by: @overweight
Signed-off-by: @overweight

flex.spec

@@ -1,6 +1,6 @@
 Name: flex
 Version: 2.6.4
-Release: 2
+Release: 3
 Summary: A fast lexical analyzer generator
 License: BSD and LGPLv2+
 URL: https://github.com/westes/flex
@@ -18,7 +18,7 @@ Patch0008: scanner-prevent-overflow-in-add_action.patch
 Patch0009: 0001-scanner-fix-default-of-yy_top_state.patch
 Patch0010: 0002-scanner-fix-default-of-yy_top_state.patch
 
-BuildRequires: gcc gettext help2man m4 bison texinfo
+BuildRequires: gcc gettext help2man m4 bison texinfo automake autoconf
 Requires: m4
 Requires(post): info
 Requires(preun): info
@@ -100,6 +100,10 @@ fi
 %{_mandir}/man1/*
 
 %changelog
+* Fri May 28 2021 yangzhuangzhuang<yangzhuangzhuang1@huawei.com> - 2.6.4-3
+- The autoreconf command is used during compilation.
+  Therefore,the automake and autoconf compilation dependencies need to added.
+
 * Sun Jun 28 2020 openEuler liuchengaung<liuchenguang4@huawei.com> - 2.6.4-2
 - quality enhancement synchronization github patch