Fix typo in builtins-x87, introduced in crrev.com/1107233004.

BUG=470930
LOG=N
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/1116933002

Cr-Commit-Position: refs/heads/master@{#28169}

src/x87/builtins-x87.cc

@@ -804,7 +804,7 @@ void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) {
 }
 
 
-void Builtins::Generate_MarkCodeToBeExecutedOnce(MacroAssembler* masm) {
+void Builtins::Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm) {
   Generate_MarkCodeAsExecutedOnce(masm);
 }