pgsql: Add support to GIN for =(anyarray,anyarray) operation

Log Message:
-----------
Add support to GIN for =(anyarray,anyarray) operation

Modified Files:
--------------
    pgsql/src/backend/access/gin:
        ginarrayproc.c (r1.2 -> r1.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginarrayproc.c.diff?r1=1.2&r2=1.3)
    pgsql/src/include/catalog:
        catversion.h (r1.337 -> r1.338)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h.diff?r1=1.337&r2=1.338)
        pg_amop.h (r1.71 -> r1.72)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_amop.h.diff?r1=1.71&r2=1.72)
    pgsql/src/test/regress/expected:
        create_index.out (r1.19 -> r1.20)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/create_index.out.diff?r1=1.19&r2=1.20)
        opr_sanity.out (r1.63 -> r1.64)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/opr_sanity.out.diff?r1=1.63&r2=1.64)
    pgsql/src/test/regress/sql:
        create_index.sql (r1.18 -> r1.19)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/create_index.sql.diff?r1=1.18&r2=1.19)