pgsql: Move USE_WIDE_UPPER_LOWER define to c.h, and remove TS_USE_WIDE

Log Message:
-----------
Move USE_WIDE_UPPER_LOWER define to c.h, and remove TS_USE_WIDE and use
USE_WIDE_UPPER_LOWER instead.

Modified Files:
--------------
pgsql/src/backend/tsearch:
regis.c (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/regis.c?r1=1.4&r2=1.5)
ts_locale.c (r1.7 -> r1.8)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_locale.c?r1=1.7&r2=1.8)
wparser_def.c (r1.14 -> r1.15)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/wparser_def.c?r1=1.14&r2=1.15)
pgsql/src/backend/utils/adt:
formatting.c (r1.141 -> r1.142)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/formatting.c?r1=1.141&r2=1.142)
oracle_compat.c (r1.79 -> r1.80)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/oracle_compat.c?r1=1.79&r2=1.80)
pgsql/src/include:
c.h (r1.226 -> r1.227)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/c.h?r1=1.226&r2=1.227)
pgsql/src/include/tsearch:
ts_locale.h (r1.5 -> r1.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_locale.h?r1=1.5&r2=1.6)