Implement toStringAsFixed, toStringAsExponential, toStringAsPrecision for integers

LibTest/core/int/toStringAsExponential/int/toStringAsExponential/A01/t01: Fail
LibTest/core/int/toStringAsFixed/int/toStringAsFixed/A01/t01: Fail
LibTest/core/int/toStringAsPrecision/int/toStringAsPrecision/A01/t01: Fail

[iposva-google]

Added Accepted label.

[vsmenon]

FYI, I hit this in the Dromaeo benchmark. I can work around by converting to double first.

I have a fix ready shortly (although it may not make sense to call toStringAsFixed on integers, since there is no fraction).

toStringAsExponential and toStringAsPrecision are not implemented in C++ yet, assigning to floitsch.

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Set owner to @floitschG.

[floitschG]

Fixed in r4681.

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Added Fixed label.

[floitschG]

Reopening and unassigning me.
I have only implemented the double version in r4681. If the specs allows it, these methods can now be implemented as x.toDouble().toStringAsFixed()...

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Removed the owner.
Added Triaged label.

[iposva-google]

Set owner to @sgmitrovic.
Added Accepted label.

The integers methods have been already implemented as x.toDouble().toStringAsFixed().

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Added Fixed label.