[interpreter] Disable OSR for BytecodeGenerator tests.

test/cctest/interpreter/test-bytecode-generator.cc

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index 434f853006423edcae53bf59917554b8e178f00f..f6b055665efb229a8ec57d3d35826f03a784fbe5 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -72,6 +72,7 @@ class InitializedIgnitionHandleScope : public InitializedHandleScope {
  public:
   InitializedIgnitionHandleScope() {
     i::FLAG_ignition = true;
+    i::FLAG_ignition_osr = false;  // TODO(4764): Disabled for now.
     i::FLAG_always_opt = false;
     i::FLAG_allow_natives_syntax = true;
     CcTest::i_isolate()->interpreter()->Initialize();