add ADJ_SETOFFSET timex mode bit (new in linux v2.6.39)
add MOD_TAI to sys/timex.h and update STA_RONLY
add clock_adjtime, remap_file_pages, and syncfs syscall wrappers patch by Justin Cormack, with slight modification
fix some header typos
various legacy and linux-specific stuff this commit is part of an effort to make more of busybox work out-of-the-box.