Fix DataOutputStream#writeUTF
Fix DataOutputStream#writeUTF

This developer did not read the specs closely enough and missed that
the length of the byte array needs to be written out first, so that
DataInputStream#readUTF has a chance of reading the string back.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

bigfatbrowncat/avian-pack.avian,lwahlmeier/avian,ucdseniordesign/avian,lostdj/avian,ucdseniordesign/avian,joshuawarner32/avian,marcinolawski/avian,bigfatbrowncat/avian-pack.avian,bgould/avian,minor-jason/avian,marcinolawski/avian,joshuawarner32/avian,dicej/avian,lwahlmeier/avian,MaartenR/avian,bigfatbrowncat/avian-pack.avian,minor-jason/avian,minor-jason/avian,MaartenR/avian,lostdj/avian,bgould/avian,lostdj/avian,dicej/avian,dicej/avian,lwahlmeier/avian,lwahlmeier/avian,bgould/avian,marcinolawski/avian,joshuawarner32/avian,MaartenR/avian,ucdseniordesign/avian,MaartenR/avian,minor-jason/avian,bgould/avian,bigfatbrowncat/avian-pack.avian,marcinolawski/avian,dicej/avian,joshuawarner32/avian,lostdj/avian,ucdseniordesign/avian