!17 enable check test suite and delete duplicate package files

From: @panxh_purple 
Reviewed-by: @xiezhipeng1 
Signed-off-by: @xiezhipeng1

flex.spec

@@ -1,6 +1,6 @@
 Name: flex
 Version: 2.6.4
-Release: 4
+Release: 5
 Summary: A fast lexical analyzer generator
 License: BSD
 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 automake autoconf
+BuildRequires: gcc gcc-c++ gettext help2man m4 bison texinfo automake autoconf
 Requires: m4
 Requires(post): info
 Requires(preun): info
@@ -68,6 +68,9 @@ ln -s flex.1 .%{_mandir}/man1/lex.1
 ln -s flex.1 .%{_mandir}/man1/flex++.1
 ln -s libfl.a .%{_libdir}/libl.a
 
+%check
+make check
+
 %post
 if [ -f %{_infodir}/flex.info.gz ]; then # for --excludedocs
    /sbin/install-info %{_infodir}/flex.info.gz --dir-file=%{_infodir}/dir ||:
@@ -97,9 +100,15 @@ fi
 
 %files help
 %{_pkgdocdir}
+%exclude %{_pkgdocdir}/NEWS
+%exclude %{_pkgdocdir}/README.md
 %{_mandir}/man1/*
 
 %changelog
+* Tue Jul 12 2022 panxiaohe <panxh.life@foxmail.com> - 2.6.4-5
+- enable check test suite
+- delete duplicate package files: NEWS,README.md
+
 * Mon Jun 13 2022 panxiaohe <panxh.life@foxmail.com> - 2.6.4-4
 - modify license