Make `String.prototype.{starts,ends}With` throw when passing a regular expression

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index c7096724ace127053e80327f116de8c3d34ac646..af627eab8c0abee3feff9cfaa3f73d1ef338d1d4 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -113,6 +113,7 @@ var kMessages = {
   promise_cyclic:                ["Chaining cycle detected for promise", "%0"],
   array_functions_on_frozen:     ["Cannot modify frozen array elements"],
   array_functions_change_sealed: ["Cannot add/remove sealed array elements"],
+  first_argument_not_regexp:     ["First argument to ", "%0", " must not be a regular expression"],
   // RangeError
   invalid_array_length:          ["Invalid array length"],
   invalid_array_buffer_length:   ["Invalid array buffer length"],