Merge pull request dotnet/coreclr#4077 from tijoytom/master

Disabling the object as variant in struct marshalling scenario

Commit migrated from https://github.com/dotnet/coreclr/commit/39f37a525650c0f57163e7eaa42057491de576f7

diff --cc src/coreclr/tests/testsFailingOutsideWindows.txt
index 8cd5ed4,d9f09a9..5b1d459
--- 1/src/coreclr/tests/testsFailingOutsideWindows.txt
--- 2/src/coreclr/tests/testsFailingOutsideWindows.txt
+++ b/src/coreclr/tests/testsFailingOutsideWindows.txt
@@@ -173,8 -173,13 +173,7 @@@ JIT/Regression/Dev11/External/dev11_145
  Interop/ArrayMarshalling/ByValArray/MarshalArrayByValTest/MarshalArrayByValTest.sh
  Interop/StringMarshalling/LPSTR/LPSTRTest/LPSTRTest.sh
  Interop/StringMarshalling/LPTSTR/LPTSTRTest/LPTSTRTest.sh
- Interop/MarshalAPI/OffsetOf/OffsetOf/OffsetOf.sh
  Interop/MarshalAPI/Miscellaneous/MarshalClassTests/MarshalClassTests.sh
 -GC/API/WeakReference/Finalize2/Finalize2.sh
 -GC/API/WeakReference/NullHandle/NullHandle.sh
 -GC/API/WeakReference/Target/Target.sh
 -GC/API/WeakReference/IsAlive/IsAlive.sh
 -GC/API/WeakReference/IsAlive_neg/IsAlive_neg.sh
 -GC/Features/Finalizer/finalizeother/finalizedirectedgraph/finalizedirectedgraph.sh
  GC/LargeMemory/Allocation/finalizertest/finalizertest.sh
  GC/LargeMemory/API/gc/reregisterforfinalize/reregisterforfinalize.sh
  GC/LargeMemory/API/gc/collect/collect.sh