Unicode in USB Product string not supported.

Hi,

it is valid for USB iProduct to use Unicode, for instance I am using a 🐝. However, this is a problem for PCSC, I get:

00001539 hotplug_libudev.c:184:HPReadBundleValues() Error parsing /usr/lib/pcsc/drivers/ifd-ccid.bundle/Contents/Info.plist

for my entry

<string>SoloKeys Solo 🐝</string>

in /etc/libccid_Info.plist.

Maybe it is a bad idea to use Unicode as other libraries may also not support Unicode...

But: Should this library support Unicode?