pgsql: Add additional includes needed on some platforms.

Log Message:
-----------
Add additional includes needed on some platforms.

Modified Files:
--------------
pgsql/contrib/btree_gist:
btree_numeric.c (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/btree_gist/btree_numeric.c.diff?r1=1.7&r2=1.8)
btree_utils_num.h (r1.9 -> r1.10)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/btree_gist/btree_utils_num.h.diff?r1=1.9&r2=1.10)
btree_utils_var.c (r1.14 -> r1.15)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/btree_gist/btree_utils_var.c.diff?r1=1.14&r2=1.15)
pgsql/src/backend/executor:
nodeHash.c (r1.106 -> r1.107)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeHash.c.diff?r1=1.106&r2=1.107)
pgsql/src/interfaces/libpq:
fe-auth.c (r1.116 -> r1.117)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-auth.c.diff?r1=1.116&r2=1.117)
fe-print.c (r1.68 -> r1.69)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-print.c.diff?r1=1.68&r2=1.69)
fe-protocol2.c (r1.22 -> r1.23)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-protocol2.c.diff?r1=1.22&r2=1.23)
fe-secure.c (r1.81 -> r1.82)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-secure.c.diff?r1=1.81&r2=1.82)
pgsql/src/port:
strdup.c (r1.9 -> r1.10)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/strdup.c.diff?r1=1.9&r2=1.10)
pgsql/src/timezone:
pgtz.c (r1.40 -> r1.41)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/pgtz.c.diff?r1=1.40&r2=1.41)
strftime.c (r1.8 -> r1.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/strftime.c.diff?r1=1.8&r2=1.9)
pgsql/src/tutorial:
funcs_new.c (r1.8 -> r1.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tutorial/funcs_new.c.diff?r1=1.8&r2=1.9)