[jamming] Patch: make.c, 'updated' handling of source files when includes are newer

[Deak Ferenc]

> IV.4. Experimental Package Management:
> ---------------------------------------
> 
> The end of our Jambase contains the definitions of several new rules
> that can be used to define independent software packages and manage
> their installation, deinstallation and dependencies on various platforms.
> 
> This code is highly experimental at the moment and we will not describe
> it here in detail. If you're interested, look at the end of the Jambase
> for rules whose name begin in Pkg (e.g. PkgBegin, PkgEnd, PkgUses, etc...)

Could you provide a detailed complete example for this package framework?

Ferenc Deak