search harder by using #include <libvbucket/vbucket.h>
search harder by using #include <libvbucket/vbucket.h>

On redhat builders, it was incorrectly not finding libvbucket/vbucket.h.  On OSX, it works correctly.  See...

See: http://builds.hq.northscale.net:8010/builders/wallace_redhate_64/builds/147/steps/compile/logs/stdio
Change-Id: I4334e302b64fae586add4f57b87266a097bfe76d
Reviewed-on: http://review.northscale.com:8080/261
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

membase/vbucketmigrator,zbase/vbucketmigrator,membase/vbucketmigrator,zbase/vbucketmigrator,membase/vbucketmigrator,zbase/vbucketmigrator,zbase/vbucketmigrator,membase/vbucketmigrator