do full kernel builds on git pulls

[Matthew Dillon]

    Numerous kernel structures will be changing this week.  People who
    regularly pull in the latest development branch will probably need
    to do full kernel rebuilds this week to avoid structural mismatches.

    I will be working on the buffer cache MPSAFE code this week, and
    possibly also MPSAFE for vnode reads and writes which hit the buffer
    cache on HAMMER filesystems.  Keep on the lookout for instabilities.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>