[Minor] Require `ragel` for Debian/RPM package build

centos/rspamd.spec

@@ -23,7 +23,7 @@ License:        BSD2c
 URL:            https://rspamd.com
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}
 BuildRequires:  glib2-devel,libevent-devel,openssl-devel,pcre-devel
-BuildRequires:  cmake,gmime-devel,file-devel,perl-Digest-MD5
+BuildRequires:  cmake,gmime-devel,file-devel,perl-Digest-MD5,ragel
 %if 0%{?suse_version} || 0%{?el7} || 0%{?fedora}
 BuildRequires:  systemd
 Requires(pre):  systemd

debian/control

@@ -2,7 +2,7 @@ Source: rspamd
 Section: mail
 Priority: extra
 Maintainer: Mikhail Gusarov <dottedmag@debian.org>
-Build-Depends: debhelper (>= 9), dpkg-dev (>= 1.16.1~), cmake, libevent-dev (>= 1.3), libglib2.0-dev (>= 2.16.0), libgmime-2.6-dev, libluajit-5.1-dev [amd64 armel armhf i386 kfreebsd-i386 mips mipsel powerpc powerpcspe] | liblua5.1-dev, libpcre3-dev, libssl-dev (>= 1.0), libcurl4-openssl-dev, libsqlite3-dev, libmagic-dev, perl, dh-systemd, libjemalloc-dev
+Build-Depends: debhelper (>= 9), dpkg-dev (>= 1.16.1~), cmake, libevent-dev (>= 1.3), libglib2.0-dev (>= 2.16.0), libgmime-2.6-dev, libluajit-5.1-dev [amd64 armel armhf i386 kfreebsd-i386 mips mipsel powerpc powerpcspe] | liblua5.1-dev, libpcre3-dev, libssl-dev (>= 1.0), libcurl4-openssl-dev, libsqlite3-dev, libmagic-dev, perl, dh-systemd, libjemalloc-dev, ragel
 Standards-Version: 3.9.6
 Homepage: https://rspamd.com
 Vcs-Git: git://github.com/vstakhov/rspamd.git