Create 'filter' argument to filter files found with 'dir' argument.

[end2endzone]

The filter could be specified with --filter=<something> and be wildcard based and support characters like * and ?.

For instance:

• --filter=*.jpg
• --filter=*.bin
• --filter=IMG_?????.jpg

This functionality would also provides the ability of generating files in the same directory as the source binary files. Using the filter *.jpg would prevent picking up *.h and *.cpp files from the generators.