Log Message:
-----------
Fix description how to create conversion function.
Modified Files:
--------------
    pgsql/src/backend/utils/mb/conversion_procs:
        README.euc_jp (r1.2 -> r1.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/README.euc_jp.diff?r1=1.2&r2=1.3)