[Ltib] host-side requirement for package

[Fritz Mueller]

Hey all,

I recently noticed when building on a fresh machine that the Avahi 
package that I contributed a while back requires the intltool package to 
be installed on the host.

I'd like to submit a patch to address this, but was wondering what the 
correct way to handle this is.  It looks like there is a global host 
dependency list in the ltib script itself (pre_install_deps), but I was 
wondering if there is a way to specify host deps per package that I 
should be using instead?

    thanks,
      --FritzM.