devel/avrdude: Add patch for AVR Dragon JTAG fix that didn't make it into 7.0

At some point after 5.11 avrdude started leaving the target stopped
upon completion of a JTAG transaction. I filed a github issue about
this issue:

https://github.com/avrdudes/avrdude/issues/366

This is super annoying because, for example, the target does not
boot after JTAG programming. Others were seeing this and shortly
after 7.0 was released, MCUdude created a PR which has since been
merged:

https://github.com/avrdudes/avrdude/pull/979

Apply this patch.

PR: 266186
Approved by: joerg (maintainer timeout, 12 weeks)