platforms: more amiga extensions

Seems HDF/HDZ are supported by P-UAE and Amiberry.

Author: cmitu

platforms.cfg

@@ -4,7 +4,7 @@
 ags_exts=".exe"
 ags_fullname="Adventure Game Studio"
 
-amiga_exts=".adf .adz .chd .cue .dms .ipf .lha .m3u .sh .uae .zip"
+amiga_exts=".adf .adz .chd .cue .dms .hdf .hdz .ipf .lha .m3u .sh .uae .zip"
 amiga_fullname="Commodore Amiga"
 
 amstradcpc_exts=".cdt .cpc .cpr .dsk .m3u .tap .zip"