debian-source.bbclass: Add support for epoch and source package name in .inc file
debian-source.bbclass: Add support for epoch and source package name in .inc file

This adds a function to save epoch and source package name to inc file.
These are required to use the API of snapshot.debian.org.

Signed-off-by: Nobuhiro Iwamatsu <126d27d25ebdb57d44427e9e193132771c216f39@toshiba.co.jp>
Signed-off-by: Kazuhiro Hayashi <d6ab13038406a238a56011921c4eda80a48396fd@toshiba.co.jp>

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