get b_ad compiling after the b_devel merge.

get b_ad compiling after the b_devel merge.
- move the possibly broken waitfor_one_page to one place
- o_mtime is seconds, that's what ll_ts2u64 returns.  s/%Lu/LPU64/
- get rid of client_tgt2uuid2obd copies, export it from obdclass
- move client_obd_{setup,cleanup} into obdclass, export, kill dupes
- remove empty ptlrpc_lib
- get rid of random sanobd dupe in lov
- hoist ll_alloc_brw out of a kernel version ifdef
- no, seriously, unsigned long flags.