[CMake] CPack DEB generator: Installed-Size field

[0xd34df00d]

Hi there!

First of all, thanks for the great software you write, CMake and CPack
really make development easier and more productive.

I've noticed that .deb packages created by CPack don't contain
Installed-Size field, so dpkg (and, consequently, aptitude and other
package managers) think that installed size of the package is 0 bytes.
Is there a way to make CPack write that field to the control file?
That would be very useful, especially because CPack could
automatically calculate the size of install targets and keep the field
up-to-date.

-- 
Kind regards,
Rudoy Georg.