devel/arduino-bsd-mk: Update to 1.4
Changes since 1.3:
- Turn off MK_DEBUG_FILES, it doesn't make sense for arduino.
- Changing "cd dir && make" with "make -C dir" solves parallel build failures.
While we're here, remove RUN_DEPENDS; we're just installing files
that can be used devel/arduino or devel/arduino18. Also break up
long lines.