openct: use upstream SRC_URI

The Debian pool URLs are not permanent, and the package is no longer
included in any active Debian release. It is also not available through
any of the default Debian snapshot mirrors. Instead of adding a new
Debian snapshot mirror, use the upstream URL directly.

Signed-off-by: Roland Hieber <rhi@pengutronix.de>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit 5265de84b3)
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-support/openct/openct_0.6.20.bb

@@ -11,7 +11,7 @@ readers to remote machines via TCP/IP."
 DEPENDS += "libtool pcsc-lite libusb-compat"
 
 SRC_URI = " \
-    ${DEBIAN_MIRROR}/main/o/${BPN}/${BPN}_${PV}.orig.tar.gz \
+    https://downloads.sourceforge.net/project/opensc/${BPN}/${BPN}-${PV}.tar.gz \
     file://etc-openct.udev.in-disablePROGRAM.patch \
     file://etc-openct_usb.in-modify-UDEVINFO.patch \
     file://openct.init \