Enable stub generation using Hydrogen/Lithium (again)

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 87b78048c65fb38ed83dc5324dee94da6d53906f..35edfa73b0cd59073a17e3249ed768772fa818ea 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1223,6 +1223,11 @@ ExternalReference ExternalReference::page_flags(Page* page) {
 }
 
 
+ExternalReference ExternalReference::ForDeoptEntry(Address entry) {
+  return ExternalReference(entry);
+}
+
+
 // Helper function to compute x^y, where y is known to be an
 // integer. Uses binary decomposition to limit the number of
 // multiplications; see the discussion in "Hacker's Delight" by Henry