Support roms in subdirectories

[spilinek]

Allows use of [name] in rompath. This is necessary when using subdirectories and multiple extensions are in use. I tried using \

extension, but this would only allow use of one extension. For example it would work with .cue, but I couldn't also use .m3u for multi-disc games.

This submission will replace [name] with the romname in the path. I added logging before and after to confirm the substitution.

First here's relevant lines from emulator file:

executable           retroarch
args                 --fullscreen -L mednafen_psx_libretro.so "[romfilename]"
rompath              $HOME/roms/psx/[name]

Console output when launch .cue with logging:

Path Before: /home/user/roms/psx/[name]/
Path After: /home/user/roms/psx/Adventures of Lomax, The (USA)/
*** Running: retroarch --fullscreen -L mednafen_psx_libretro.so "/home/user/roms/psx/Adventures of Lomax, The (USA)/Adventures of Lomax, The (USA).cue"

Console output when launch .m3u with logging:

Path Before: /home/user/roms/psx/[name]/
Path After: /home/user/roms/psx/Final Fantasy IX (USA)/
*** Running: retroarch --fullscreen -L mednafen_psx_libretro.so "/home/user/roms/psx/Final Fantasy IX (USA)/Final Fantasy IX (USA).m3u"

I know I'm not the only one to run into this issue. This was also discussed on the forum

[mickelson]

Thanks!