samples: usb: webusb: Add MS-OS descriptors for compatible IDs

This adds some vendor-specific microsoft USB descriptors, which
makes the win8/win10 enumeration process to report a "WINUSB"
capability, which in turn automatically binds a WinUSB.sys driver
to a specific set of interfaces. This, in theory, makes userspace
drivers easier to handle in win32/win64 platforms.

Signed-off-by: Iván Sánchez Ortega <ivan@sanchezortega.es>