- update to yesterday before letting ctest update to today, for each run
   (so failures get emailed right)
 - use a third of the cores as -j
 - don't build tag databases
 - swap memcheck and coverage to prioritize getting more results out earlier
refs #5159


git-svn-id: file:///svn/toku/tokudb@45043 c7de825b-a66e-492c-adef-691d508d4ae1