Add verbose flag to cross test runner too.
MODIFY
lib/mruby/build.rb
lib/mruby/build.rb
@@ -344,6 +344,7 @@ EOS
end
def run_test
+ @test_runner.runner_options << ' -v' if $verbose
mrbtest = exefile("#{build_dir}/bin/mrbtest")
if (@test_runner.command == nil)
puts "You should run #{mrbtest} on target device."

Add verbose flag to cross test runner too.