Rename JumpToBuiltin to JumpToRuntime. Add comment to ResolveBuiltin.

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
===================================================================
--- src/arm/builtins-arm.cc	(revision 2967)
+++ src/arm/builtins-arm.cc	(working copy)
@@ -44,10 +44,10 @@
   __ str(r1, MemOperand(ip, 0));
 
   // The actual argument count has already been loaded into register
-  // r0, but JumpToBuiltin expects r0 to contain the number of
+  // r0, but JumpToRuntime expects r0 to contain the number of
   // arguments including the receiver.
   __ add(r0, r0, Operand(1));
-  __ JumpToBuiltin(ExternalReference(id));
+  __ JumpToRuntime(ExternalReference(id));
 }