pgsql: Add a few more DTrace probes to the backend.

Log Message:
-----------
Add a few more DTrace probes to the backend.

Robert Lor

Modified Files:
--------------
pgsql/src/backend:
Makefile (r1.128 -> r1.129)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/Makefile?r1=1.128&r2=1.129)
pgsql/src/backend/access/transam:
clog.c (r1.46 -> r1.47)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/clog.c?r1=1.46&r2=1.47)
multixact.c (r1.27 -> r1.28)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/multixact.c?r1=1.27&r2=1.28)
subtrans.c (r1.22 -> r1.23)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/subtrans.c?r1=1.22&r2=1.23)
twophase.c (r1.43 -> r1.44)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/twophase.c?r1=1.43&r2=1.44)
pgsql/src/backend/postmaster:
pgstat.c (r1.176 -> r1.177)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/pgstat.c?r1=1.176&r2=1.177)
pgsql/src/backend/storage/buffer:
bufmgr.c (r1.234 -> r1.235)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/buffer/bufmgr.c?r1=1.234&r2=1.235)
pgsql/src/backend/storage/lmgr:
deadlock.c (r1.53 -> r1.54)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/lmgr/deadlock.c?r1=1.53&r2=1.54)
lock.c (r1.183 -> r1.184)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/lmgr/lock.c?r1=1.183&r2=1.184)
lwlock.c (r1.51 -> r1.52)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/lmgr/lwlock.c?r1=1.51&r2=1.52)
pgsql/src/backend/tcop:
postgres.c (r1.554 -> r1.555)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/postgres.c?r1=1.554&r2=1.555)
pquery.c (r1.123 -> r1.124)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/pquery.c?r1=1.123&r2=1.124)
pgsql/src/backend/utils:
Gen_dummy_probes.sed (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/Gen_dummy_probes.sed?r1=1.1&r2=1.2)
Makefile (r1.27 -> r1.28)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/Makefile?r1=1.27&r2=1.28)
probes.d (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/probes.d?r1=1.2&r2=1.3)
pgsql/src/backend/utils/sort:
tuplesort.c (r1.85 -> r1.86)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/sort/tuplesort.c?r1=1.85&r2=1.86)