Command line Usage text, examples includes undocumented -ff and -fx

[Mike Nordell]

compressonator/applications/compressonatorcli/source/compressonatorcli.cpp

Line 358 in 0a45734

 printf("compressonatorcli -fd BC7  -ff PNG -fx KTX ./source_dir/ ./dist_dir/\n"); 

Neither -ff nor -fx are included in the list of options.