package/tor: bump version to 0.4.3.6

package/tor: bump version to 0.4.3.6

Release notes for 0.4.3.5: https://blog.torproject.org/node/1872
"Tor 0.4.3.5 is the first stable release in the 0.4.3.x series."

Release notes for 0.4.3.6: https://blog.torproject.org/node/1900

The fix for CVE-2020-15572 "Fix a crash due to an out-of-bound memory
access when Tor is compiled with NSS support" does not affect buildroot
because we do not support building tor with libnss.

Rebased patch 0001.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>