Doesn't open Onedrive folders under W10 Preview Build 16273

[lokijota]

• VSCode Version: Code 1.15.1 (41abd21, 2017-08-16T18:05:38.342Z)
• OS Version: Windows_NT ia32 10.0.16273
• Extensions:

Extension	Author (truncated)	Version
armsnippet	art	0.7.0
arm	dan	0.1.2
python	don	0.7.0
xml	Dot	1.9.2
json-tools	eri	1.0.2
MagicPython	mag	1.0.12
prettify-json	moh	0.0.3
csharp	ms-	1.12.1
mono-debug	ms-	0.15.7
azurerm-vscode-tools	msa	0.3.6
java	red	0.8.0
python	tht	0.2.3

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Steps to Reproduce:

1. Open VS Code
2. Navigate to a folder (in OneDrive) and open it
3. You get "Path does not exist" for all folders

Reproduces without extensions: Yes/No

[bpasero]

#27285