LUFA board not detected if compiled with avr-binutils-2.21.
dmesg: usb 3-1: device descriptor read/64, error 2 (and several other similar errors).
expected: usb 3-1: New USB device found, idVendor=03eb, idProduct=2ff9
It seems to be a regression: it worked fine with binutils-2.20, but fails with version 2.21.
It was reported that SRAM start offset seems to be
incorrect (0x60 in the new and 0x100 in the older version).
Full bug report and attached compiled files: https://bugzilla.redhat.com/show_bug.cgi?id=704456