HACK: Force debugging output on to try to identify CI bot issue.

The CI for llvm#163027 is reliably
reproducing the bug from llvm#158270.
This patch temporarily adds debugging output to the PR for the former to try
to gain insight into the latter.

Author: lhames

llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp

@@ -16,6 +16,7 @@
 #include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/Support/CodeGen.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/TargetParser/Host.h"
 #include "llvm/Testing/Support/Error.h"
 #include "gtest/gtest.h"
@@ -33,7 +34,10 @@ class ReOptimizeLayerTest : public testing::Test {
   }
 
 protected:
+
   void SetUp() override {
+    DebugFlag = true;
+
     auto JTMB = JITTargetMachineBuilder::detectHost();
     // Bail out if we can not detect the host.
     if (!JTMB) {
@@ -103,6 +107,10 @@ class ReOptimizeLayerTest : public testing::Test {
                                                     std::move(CompileFunction));
   }
 
+  void TearDown() override {
+    DebugFlag = OrigDebugFlag;
+  }
+
   Error addIRModule(ResourceTrackerSP RT, ThreadSafeModule TSM) {
     assert(TSM && "Can not add null module");
 
@@ -117,8 +125,11 @@ class ReOptimizeLayerTest : public testing::Test {
   std::unique_ptr<IRCompileLayer> CompileLayer;
   std::unique_ptr<ReOptimizeLayer> ROLayer;
   std::unique_ptr<DataLayout> DL;
+  static const bool OrigDebugFlag;
 };
 
+const bool ReOptimizeLayerTest::OrigDebugFlag = DebugFlag;
+
 static Function *createRetFunction(Module *M, StringRef Name,
                                    uint32_t ReturnCode) {
   Function *Result = Function::Create(