Bug: 17940
Show which plugin(s) that is updated and need a restart in the web UI's
footer.
Check cache and Firmware folder for potential firmware files
Add helper app binaries for x86_64 linux (alac, faad, flac, sox for now)
On x86_64 use both x86_64 and i386 to look for helper apps
Fix executable flag on scripts.

Change-Id: I7739b680395d1ee786cf5216cc3aa857f5cab8a8