Small fix to build package in Debian Squeeze

Fix this:

dh_strip: debug package librift-dbg is not listed in the control file
make: *** [binary-strip-IMPL/rift] Error 9
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2
debuild: fatal error at line 1325:


cp: cannot stat `README': No such file or directory
dh_installdocs: cp -a README debian/rift/usr/share/doc/rift returned exit code 1
make: *** [binary-install/rift] Error 2