Update to new upstream release 1.43.3.

ChangeLog: (also see the log for 1.43.2 that the port skipped!)
http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.43.3

While here, refresh patches, and time-limit programs in self-test suite
to 60 s CPU time each, to avoid runaway processes from stalling the
self-tests for too long.

Still no joy on FreeBSD 11+ - the self-test results hint to massive data
loss, and more than 10 self-tests fail.