[ORC] Disable the ReOptimizeLayerTest on Windows. (llvm#163930)

This test has been failing for unclear reasons. ReOptimizeLayer on
Windows isn't well supported yet, so just disable this for now.

llvm#158270

Author: lhames

llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp

@@ -43,7 +43,7 @@ class ReOptimizeLayerTest : public testing::Test {
 
     // COFF-ARM64 is not supported yet
     auto Triple = JTMB->getTargetTriple();
-    if (Triple.isOSBinFormatCOFF() && Triple.isAArch64())
+    if (Triple.isOSBinFormatCOFF())
       GTEST_SKIP();
 
     // SystemZ is not supported yet.