[OE-core] archiver.bbclass: what is the purpose of create_diff_gz?

[kevin.strasser at linux.intel.com]

Hi All,

In it's current state, the source archiver creates a diff.gz file
containing everything found in 'S'. I am wondering if this was really the
intended behavior, as 'S' usually contains things like object and binary
files. If anything, I would expect that this file should represent all
changes made to the original sources.

Thanks,
Kevin