pgsql: Added Joachim's changes for MinGW.

Log Message:
-----------
Added Joachim's changes for MinGW.
Added SET DATESTYLE to one test so the output format is defined.

Modified Files:
--------------
pgsql/src/interfaces/ecpg/pgtypeslib:
dt_common.c (r1.35 -> r1.36)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/dt_common.c.diff?r1=1.35&r2=1.36)
pgsql/src/interfaces/ecpg/test:
pg_regress.sh (r1.14 -> r1.15)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/pg_regress.sh.diff?r1=1.14&r2=1.15)
pgsql/src/interfaces/ecpg/test/compat_informix:
dec_test.pgc (r1.4 -> r1.5)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/compat_informix/dec_test.pgc.diff?r1=1.4&r2=1.5)
pgsql/src/interfaces/ecpg/test/expected:
compat_informix-dec_test.c (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c.diff?r1=1.7&r2=1.8)
pgtypeslib-num_test.c (r1.6 -> r1.7)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-num_test.c.diff?r1=1.6&r2=1.7)
pgtypeslib-num_test.stderr (r1.4 -> r1.5)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-num_test.stderr.diff?r1=1.4&r2=1.5)
pgtypeslib-num_test2.c (r1.9 -> r1.10)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c.diff?r1=1.9&r2=1.10)
preproc-variable.c (r1.1 -> r1.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-variable.c.diff?r1=1.1&r2=1.2)
preproc-variable.stderr (r1.1 -> r1.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-variable.stderr.diff?r1=1.1&r2=1.2)
preproc-variable.stdout (r1.1 -> r1.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-variable.stdout.diff?r1=1.1&r2=1.2)
pgsql/src/interfaces/ecpg/test/pgtypeslib:
num_test.pgc (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/pgtypeslib/num_test.pgc.diff?r1=1.3&r2=1.4)
num_test2.pgc (r1.6 -> r1.7)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc.diff?r1=1.6&r2=1.7)
pgsql/src/interfaces/ecpg/test/preproc:
variable.pgc (r1.1 -> r1.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/preproc/variable.pgc.diff?r1=1.1&r2=1.2)