Added libusb patches and info

Information regarding the work done in libusb is added.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>
Added libftdi patches and related info

The contents can be found at libftdi folder.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>