RecordWriteStubs on ARM need to save FP registers

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index f9f672bac6d084bbbad8fc6d6ea2a1cd3385f569..75194a85ee5ea6de47467c1907e7e647795aefd2 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -997,6 +997,13 @@ class MacroAssembler: public Assembler {
   // Z condition flag: Z==0 if d16-d31 available, Z==1 otherwise.
   void CheckFor32DRegs(Register scratch);
 
+  // Does a runtime check for 16/32 FP registers. Either way, pushes 32 double
+  // values to location, saving [d0..(d15|d31)].
+  void SaveFPRegs(Register location, Register scratch);
+
+  // Does a runtime check for 16/32 FP registers. Either way, pops 32 double
+  // values to location, restoring [d0..(d15|d31)].
+  void RestoreFPRegs(Register location, Register scratch);
 
   // ---------------------------------------------------------------------------
   // Runtime calls