AppImage does not run on Windows

[probonopd]

Steps to reproduce

• Enable developer mode in Windows
• Install Windows Subsystem for Linux
• Install Xming (or another X Windows Server that runs on Windows) and launch it
• export DISPLAY=:0
• Download PowerShell-6.0.0-alpha.18-x86_64.AppImage
• chmod a+x /mnt/c/Users/User/Downloads/PowerShell-6.0.0-alpha.18-x86_64.AppImage
• /mnt/c/Users/User/Downloads/PowerShell-6.0.0-alpha.18-x86_64.AppImage --appimage-extract since Windows doesn't support FUSE yet
• ./squashfs-root/AppRun

Expected behavior

Runs

Actual behavior

./squashfs-root/AppRun: 3: export: (x86)/Intel/iCLS: bad variable name

Environment data

Name                           Value
----                           -----
PSVersion                      6.0.0-alpha
PSEdition                      Core
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   3.0.0.0
GitCommitId                    v6.0.0-alpha.18
CLRVersion
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1