Thread: pgsql: Fix up PGDLLIMPORT marking for standard_conforming_strings.

Log Message:
-----------
Fix up PGDLLIMPORT marking for standard_conforming_strings.  Moving it
into a header file that plpgsql's scan.l can see broke the previous
kluge.  Per buildfarm results.

Modified Files:
--------------
    pgsql/src/include/parser:
        parser.h (r1.26 -> r1.27)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/parser/parser.h?r1=1.26&r2=1.27)
    pgsql/src/pl/plpgsql/src:
        scan.l (r1.70 -> r1.71)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/scan.l?r1=1.70&r2=1.71)