Merge remote-tracking branch 'remotes/sstabellini/xen_arm_20140707' into staging * remotes/sstabellini/xen_arm_20140707: xen: build on ARM xen_backend: introduce xenstore_read_uint64 and xenstore_read_fe_uint64 Signed-off-by: Peter Maydell <peter.maydell@linaro.org>