Log Message:
-----------
Add exec.c to ecpg library because path.c now uses it.
Modified Files:
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pgsql-server/src/interfaces/ecpg/ecpglib:
Makefile (r1.22 -> r1.23)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/ecpglib/Makefile.diff?r1=1.22&r2=1.23)