[turbofan] Add DebugBreak machine operator and support

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index d98d2fe1a89830fac77c09df9f231ed8ba2ad4ff..7eba280d0a4bbe176f41fd8347025aa5f9bda8f9 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -2008,6 +2008,8 @@ Type* Typer::Visitor::TypeObjectIsUndetectable(Node* node) {
 
 // Machine operators.
 
+Type* Typer::Visitor::TypeDebugBreak(Node* node) { return Type::None(); }
+
 Type* Typer::Visitor::TypeLoad(Node* node) { return Type::Any(); }
 
 Type* Typer::Visitor::TypeStackSlot(Node* node) { return Type::Any(); }