[turbofan] Add DebugBreak machine operator and support

src/compiler/code-assembler.cc

Index: src/compiler/code-assembler.cc
diff --git a/src/compiler/code-assembler.cc b/src/compiler/code-assembler.cc
index 0a90b9e9251130c1b5fe1d872aa9d3d24f73ef8d..3ceb2ab03e7095af496204041e368a19132b11ef 100644
--- a/src/compiler/code-assembler.cc
+++ b/src/compiler/code-assembler.cc
@@ -532,6 +532,8 @@ void CodeAssembler::Branch(Node* condition, CodeAssembler::Label* true_label,
                                 false_label->label_);
 }
 
+void CodeAssembler::DebugBreak() { raw_assembler_->DebugBreak(); }
+
 void CodeAssembler::Switch(Node* index, Label* default_label,
                            int32_t* case_values, Label** case_labels,
                            size_t case_count) {