[turbofan] Math.random never produces -0.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 67d11370e4b41f14198d23090bac515580b835f0..1260881d8b1cce5b893205b6afdb97d332606b76 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1295,7 +1295,7 @@ Type* Typer::Visitor::JSCallFunctionTyper(Type* fun, Typer* t) {
     if (function->shared()->HasBuiltinFunctionId()) {
       switch (function->shared()->builtin_function_id()) {
         case kMathRandom:
-          return Type::OrderedNumber();
+          return Type::PlainNumber();
         case kMathFloor:
         case kMathCeil:
         case kMathRound: