Upgrade ECPG to 2.0

src/interfaces/ecpg/ChangeLog

src/interfaces/ecpg/TODO

src/interfaces/ecpg/include/Makefile

src/interfaces/ecpg/include/ecpglib.h

src/interfaces/ecpg/include/ecpgtype.h

src/interfaces/ecpg/lib/Makefile.in

src/interfaces/ecpg/lib/ecpglib.c

src/interfaces/ecpg/preproc/Makefile

src/interfaces/ecpg/preproc/c_keywords.c

src/interfaces/ecpg/preproc/ecpg.c

src/interfaces/ecpg/preproc/ecpg_keywords.c

src/interfaces/ecpg/preproc/extern.h

src/interfaces/ecpg/preproc/keywords.c

src/interfaces/ecpg/preproc/pgc.l

src/interfaces/ecpg/preproc/preproc.y

src/interfaces/ecpg/preproc/type.c

src/interfaces/ecpg/preproc/type.h

src/interfaces/ecpg/test/Makefile

src/interfaces/ecpg/test/perftest.pgc

src/interfaces/ecpg/test/test2.pgc