astro/xphoon: Catch up to src bb421be6c117

src bb421be6c117 moved ftime(3) to libutil. This resulted in this
error:

cc -o xphoon -L/usr/local/lib xphoon.o moon.o phase.o dtime.o
-lXext -lX11 -lcompat -lm -Wl,-rpath,/usr/local/lib
ld: error: undefined symbol: ftime

While at it take maintainership of this port.

(cherry picked from commit 4b6488142679ff15ddcfe1acec2be0e966b0267c)

astro/xphoon: Fix patch

Fixes: 4b6488142679

(cherry picked from commit 999b06a56c46cc6396f8984add5e7036de0916b7)