pgsql: Backported regression test changes from HEAD so the buildfarm

Log Message:
-----------
Backported regression test changes from HEAD so the buildfarm hopefully gets green again.

Tags:
----
REL8_2_STABLE

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/test/compat_informix:
        dec_test.pgc (r1.5 -> r1.5.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/compat_informix/dec_test.pgc.diff?r1=1.5&r2=1.5.2.1)
    pgsql/src/interfaces/ecpg/test/expected:
        compat_informix-dec_test-MinGW32.stdout (r1.1 -> r1.1.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-dec_test-MinGW32.stdout.diff?r1=1.1&r2=1.1.2.1)
        compat_informix-dec_test.c (r1.10 -> r1.10.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c.diff?r1=1.10&r2=1.10.2.1)
        compat_informix-dec_test.stdout (r1.3 -> r1.3.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout.diff?r1=1.3&r2=1.3.2.1)
        pgtypeslib-num_test2-MinGW32.stdout (r1.1 -> r1.1.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2-MinGW32.stdout.diff?r1=1.1&r2=1.1.2.1)
        pgtypeslib-num_test2.c (r1.12 -> r1.12.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c.diff?r1=1.12&r2=1.12.2.1)
        pgtypeslib-num_test2.stdout (r1.4 -> r1.4.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.stdout.diff?r1=1.4&r2=1.4.2.1)
    pgsql/src/interfaces/ecpg/test/pgtypeslib:
        num_test2.pgc (r1.7 -> r1.7.2.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc.diff?r1=1.7&r2=1.7.2.1)