fixbug: add NULL handling on gpuhashjoin_copy_plan()
fixbug: copyObject() didn't support T_IntList and T_OidList; list_copy() instead
bugfix: character form of typalign is used to align offset in gpuhashjoin.c
Merge branch 'master' of https://github.com/kaigai/pg_strom
bugfix: add unlock and putting tcs - being forgotten
bugfix: add bms_copy(required) outer to hold the bitmap in private area
Merge branch 'master' into preagg