Update F# to latest

[KevinRansom]

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[dnfclas]

@KevinRansom,
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[KevinRansom]

@dotnet-bot test CentOS7.1 x64 Debug Build please

[KevinRansom]

Tagging @MattGertz for approval pending CI tests.

Customer scenario:
This upgrades the F# compiler to the latest build. It contains fixes that enable Property pages for dotnet SDK project to edit a number of properties that are not editable without this change.

Workarounds, if any:
A developer can edit the project file to Manually set these values

**Performance impact : **
None

Root cause analysis : Not yet implemented. This is the first release to support dotnet sdk projects.
How was this bug found?: Adhoc testing

[MattGertz]

(Approval is pending the all-up approval by JoC/Gus, but this can at least be merged into the payload.)