Some build artifacts are not in build/

[ExpoSeed]

The following build artifacts are placed in the same directory as the original.

• sound/direct_sound_samples/*.bin
• sound/songs/midi/*.s
• *.1bpp
• *.4bpp
• *.8bpp
• *.gbapal
• *.lz
• *.latfont
• *.hwjpnfont
• *.fwjpnfont
• *.rl (not caught by make clean, see #1225)

They should be placed in build/ in the Makefile.

[GriffinR]

.rl as well. That's not caught by make clean for some reason