MIPS: Avoid using dd() in Prologue when --optimize-for-size.

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
diff --git a/src/mips/assembler-mips.cc b/src/mips/assembler-mips.cc
index 0972a8295cbe40ab049649d9035c783f3cf42e8d..d84315abf452a907319c9ed5043f13a6bf444970 100644
--- a/src/mips/assembler-mips.cc
+++ b/src/mips/assembler-mips.cc
@@ -2031,6 +2031,14 @@ void Assembler::dd(uint32_t data) {
 }
 
 
+void Assembler::emit_code_stub_address(Code* stub) {
+  CheckBuffer();
+  *reinterpret_cast<uint32_t*>(pc_) =
+      reinterpret_cast<uint32_t>(stub->instruction_start());
+  pc_ += sizeof(uint32_t);
+}
+
+
 void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) {
   // We do not try to reuse pool constants.
   RelocInfo rinfo(pc_, rmode, data, NULL);