Quick hack: Javassisted ArrayImg + constant

Christian Dietz asked for it.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Add a test for the quickly hacked array+constant

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Fix tyop

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Merge branch 'quick-hack'

This adds a quick hack (no defensive programming at all!) to be able to
benchmark the Javassist-generated op against the others.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>