Short instructions for creating bind-chroot SRPMS/RPMS with those files.
This was tested on RedHat 6.1 installation...

1) get latest bind-xxx.src.rpm package (for example with 
   rpmfind --sources bind)

2) install it (with rpm -i bind-xxx.src.rpm), it should land in
   /usr/src/redhat/{SOURCES,SPECS} by default

3) copy bind-chroot.spec to /usr/src/redhat/SPECS

4) copy all other files to /usr/src/redhat/SOURCES

5) create user 'named' if it does not exist yet (for example with
   adduser named)

6) cd /usr/src/redhat/SPECS

7) create SRPM/RPM packages (rpm -ba bind-chroot.spec) - they will be placed
   in /usr/src/redhat/{SRPMS,RPMS}