Port COMException fix from master

[shrah]

This fixes https://github.com/dotnet/corefx/issues/25960 in 2.0.0 by porting the #13553 change from master.

@tarekgh @tijoytom @karelz @danmosemsft

[tarekgh]

LGTM. Is it possible you validate the fix to ensure it is really fixed the issue? Thanks.

[shrah]

@dotnet-bot test Ubuntu arm Cross Release Build
@dotnet-bot test Ubuntu16.04 arm Cross Debug Build
@dotnet-bot test Windows_NT arm Cross Debug Build
@dotnet-bot test Windows_NT arm Cross Release Build

[shrah]

@dotnet-bot test Ubuntu arm Cross Release Build
@dotnet-bot test Ubuntu16.04 arm Cross Debug Build
@dotnet-bot test Windows_NT arm Cross Debug Build
@dotnet-bot test Windows_NT arm Cross Release Build

[danmoseley]

The ARM legs are broken. @RussKeldorph did you say you might know why they are enabled/who would own fixing them?

Meantime I think it is OK to ignore these. We do not ship 2.0.x for ARM ourselves and we know this already works in master.

[shrah]

@tarekgh , I have verified in local machine that it indeed fixes the issue.

[shrah]

@danmosemsft , should I just go ahead and merge it?

[danmoseley]

@shrah , @safern or @wtgodbe will ping you when the branch opens - or just hit merge thesmelves.

[safern]

branches are ready to merge now.

[tarekgh]

thanks @shrah for porting the fix.