[TD-2831]<feature>add email file in pkg

packaging/deb/makedeb.sh

@@ -43,6 +43,7 @@ mkdir -p ${pkg_dir}${install_home_path}/include
 mkdir -p ${pkg_dir}${install_home_path}/init.d
 mkdir -p ${pkg_dir}${install_home_path}/script
  
+echo "" >                                           ${pkg_dir}${install_home_path}/email
 cp ${compile_dir}/../packaging/cfg/taos.cfg         ${pkg_dir}${install_home_path}/cfg
 cp ${compile_dir}/../packaging/deb/taosd            ${pkg_dir}${install_home_path}/init.d
 cp ${compile_dir}/../packaging/tools/post.sh        ${pkg_dir}${install_home_path}/script

packaging/rpm/tdengine.spec

@@ -51,6 +51,7 @@ mkdir -p %{buildroot}%{homepath}/include
 mkdir -p %{buildroot}%{homepath}/init.d
 mkdir -p %{buildroot}%{homepath}/script
 
+echo "" > %{buildroot}%{homepath}/email
 cp %{_compiledir}/../packaging/cfg/taos.cfg         %{buildroot}%{homepath}/cfg
 cp %{_compiledir}/../packaging/rpm/taosd            %{buildroot}%{homepath}/init.d
 cp %{_compiledir}/../packaging/tools/post.sh        %{buildroot}%{homepath}/script