perl 5.8.8: Fix to tell bitbake about the perl module packages. I'd left out

perl 5.8.8: Fix to tell bitbake about the perl module packages. I'd left out
the PACKAGES_DYNAMIC declaration for the perl modules. This declaration
appears to be global though - so if either of the older perl versions exist
it actually works - bitbake picks up the definition from the older recipes
even though it isn't building them. This shows up as "No providers of
runtime build target <x>" errors where x is a perl module. Thanks to Koen
for figuring this one out.