ser2net: upgrade 4.6.6 -> 4.6.7

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit 23d4ba6b96)

ser2net is updated to fix some issues in reloading the configuration.
There were some situations that could cause crashes.
The bug was actually in gensio, but a workaround has been added to ser2net for
older versions of gensio.

https://github.com/cminyard/ser2net/releases/tag/v4.6.7

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Anuj Mittal <anuj.mittal@oss.qualcomm.com>

meta-oe/recipes-connectivity/ser2net/ser2net_4.6.7.bb

@@ -11,7 +11,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/project/ser2net/ser2net/ser2net-${PV}.tar.gz \
     file://ser2net.service \
 "
 
-SRC_URI[sha256sum] = "a468073c7bf8166c78c61d30bba487916dc4088e98f96e190b37ea8100a94fd4"
+SRC_URI[sha256sum] = "6b921bc7efb1b9a8a78268d63332701902cc1c8dbac51842d46ede6ffb5fa2a4"
 
 UPSTREAM_CHECK_URI = "http://sourceforge.net/projects/ser2net/files/ser2net"