Incorrect narrow weekday names

[kate2753]

Intl.js polyfill is not using correct values for narrow weekday names.

For example (if [ '', 'yMMMEEEEEd' ] format with narrow weekday is added to the Ldml2Json.js tool) Intl.js polyfill's output for

for(var day = 0; day < 7; day ++) {
        console.log((new Intl.DateTimeFormat('da-u-nu-latn-ca-gregory', {
            weekday: "narrow",
            day: "numeric",
            month: "short",
            year: "numeric"
        })).format(new Date(2015, 2, day)));
    }

is

lø 28. feb. 2015
sø 1. mar. 2015
ma 2. mar. 2015
ti 3. mar. 2015
on 4. mar. 2015
to 5. mar. 2015
fr 6. mar. 2015 

While Chrome 42 and Firefox 37 both output:

L 28. feb. 2015
S 1. mar. 2015
M 2. mar. 2015
T 3. mar. 2015
O 4. mar. 2015
T 5. mar. 2015
F 6. mar. 2015