Using ${DEBIAN_MIRROR} for SRC_URI doesn't work very well as that will
only contain releases that are currently in Debian. So, move all of SRC_URI
to the .bb so it can use snapshot.debian.org instead, and set
UPSTREAM_CHECK_URI to ${DEBIAN_MIRROR} so upstream release checking continues
to work.
[YOCTO #10040]
(From OE-Core rev: 1b38ad4cb8faeb86c5e8cb6b7201194722c5ef31)
Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>