Launcher: show certain messages only in verbose mode
Launcher: show certain messages only in verbose mode

Both the LD_LIBRARY_PATH message and the one about re-executing with
less reserved heap space can be pretty annoying.

Introduce the --verbose option and show them only when that option was
passed to the launcher.

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

imagej/imagej-launcher,imagej/imagej-launcher,imagej/imagej-launcher