pgsql-server: New translation

Log Message:
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New translation

Modified Files:
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pgsql-server/src/backend:
nls.mk (r1.13 -> r1.14)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/nls.mk.diff?r1=1.13&r2=1.14)

Added Files:
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pgsql-server/src/backend/po:
sk.po (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/po/sk.po?rev=1.1&content-type=text/x-cvsweb-markup)