DTrace support, with a small initial set of probes

configure

configure.in

doc/src/sgml/installation.sgml

src/Makefile.global.in

src/backend/Makefile

src/backend/access/transam/xact.c

src/backend/storage/lmgr/lock.c

src/backend/storage/lmgr/lwlock.c

src/backend/utils/probes.d

src/include/c.h

src/include/pg_config.h.in

src/include/pg_trace.h