base-foc: Set executable bit when mapping pages

If these are not set, this leads to page faults, during code execution on
x86_64, ARM, and x86_32 with PAE enabled.
usb: Upgrade to Linux-3.8.6 stack
usb: Upgrade to Linux-3.9.0-rc8 stack
lwip-test: Adapt for Arndale board
usb: DWC3 and XHCI support

Arndale platform only.