yafut: update to fix basename() issue

yafut: update to fix basename() issue

Since musl 1.2.5 update yafut would throw a warning about implicit
declaration of basename() but would still somehow compile.
However, trying to use it on a device will cause it to instantly
Segmentation fault.

So, to fix this lets update to the current upstream repository version
that has removed the use of basename() completely.

Link: https://github.com/openwrt/openwrt/pull/15685
Signed-off-by: Robert Marko <robimarko@gmail.com>