Regression test updates and fixes

src/interfaces/ecpg/ChangeLog

src/interfaces/ecpg/Makefile

src/interfaces/ecpg/ecpglib/descriptor.c

src/interfaces/ecpg/test/Makefile

src/interfaces/ecpg/test/complex/test5.pgc

src/interfaces/ecpg/test/connect/Makefile

src/interfaces/ecpg/test/connect/test1.pgc.in

src/interfaces/ecpg/test/connect/test2.pgc

src/interfaces/ecpg/test/connect/test3.pgc

src/interfaces/ecpg/test/expected/complex-test5.c

src/interfaces/ecpg/test/expected/complex-test5.stdout

src/interfaces/ecpg/test/expected/connect-test1.c

src/interfaces/ecpg/test/expected/connect-test1.stderr

src/interfaces/ecpg/test/expected/connect-test1.stdout

src/interfaces/ecpg/test/expected/connect-test2.c

src/interfaces/ecpg/test/expected/connect-test2.stderr

src/interfaces/ecpg/test/expected/connect-test3.c

src/interfaces/ecpg/test/expected/connect-test3.stderr

src/interfaces/ecpg/test/expected/errors-notice.c

src/interfaces/ecpg/test/expected/errors-notice.stderr