Fix catching polymorphic type by value

Replace catching polymorphic type std::bad_alloc 'by value'
with 'by reference'.
Pointed by gcc8

Add FAT addon for DriveSetup

Tested with a 5MB image, seems to work.

There seems to be an issue with too long names though, or possibly names with spaces.

Also, technically it supports FAT12,16 and 32, so it should probably be renamed
in the interface.

Didn't check how to declare support for more than 1 partition types either.