fix ecpg regression tests broken by over-eager adding of $PostgreSQL$ markers

src/interfaces/ecpg/include/sql3types.h

-/*
- * $PostgreSQL: pgsql/src/interfaces/ecpg/include/sql3types.h,v 1.12 2008/05/17 01:28:25 adunstan Exp $ 
- */
 #ifndef _ECPG_SQL3TYPES_H
 #define _ECPG_SQL3TYPES_H
 

src/interfaces/ecpg/include/sqlca.h

-/*
- * $PostgreSQL: pgsql/src/interfaces/ecpg/include/sqlca.h,v 1.30 2008/05/17 01:28:25 adunstan Exp $ 
- */
 #ifndef POSTGRES_SQLCA_H
 #define POSTGRES_SQLCA_H
 

src/interfaces/ecpg/test/regression.h

-/*
- * $PostgreSQL: pgsql/src/interfaces/ecpg/test/regression.h,v 1.2 2008/05/17 01:28:25 adunstan Exp $ 
- */
 exec sql define REGRESSDB1 regress1;
 exec sql define REGRESSDB2 connectdb;