lang/nll: Update 20250413a => 20250805a

Changelog:

• Added the argument of RUN command for setting the ARGV[].
• Added the operator for condition to execute.
• Reflect setting of GSETRANGE()/GSETOFFSET()/GSETSCALE() at the coordinate of the mouse.

https://kozos.jp/nlux/download.html

Improve port (non-functional changes):

• Rename "default" flavor to "sdl2".
• Move ".if ${FLAVOR} == *" section higher.

PR: 288767