Add VSUB{S,D} instructions to the integrated ARM assembler.

src/DartARM32/assembler_arm.cc

Index: src/DartARM32/assembler_arm.cc
diff --git a/src/DartARM32/assembler_arm.cc b/src/DartARM32/assembler_arm.cc
index 8432a0136a3c00613e578005b7ed8a22100f3064..f5a86ce159b867ebe119bf371c7b9ab8876d3fa2 100644
--- a/src/DartARM32/assembler_arm.cc
+++ b/src/DartARM32/assembler_arm.cc
@@ -977,7 +977,6 @@ void Assembler::vaddd(DRegister dd, DRegister dn, DRegister dm,
                       Condition cond) {
   EmitVFPddd(cond, B21 | B20, dd, dn, dm);
 }
-#endif
 
 void Assembler::vsubs(SRegister sd, SRegister sn, SRegister sm,
                       Condition cond) {
@@ -989,7 +988,7 @@ void Assembler::vsubd(DRegister dd, DRegister dn, DRegister dm,
                       Condition cond) {
   EmitVFPddd(cond, B21 | B20 | B6, dd, dn, dm);
 }
-
+#endif
 
 void Assembler::vmuls(SRegister sd, SRegister sn, SRegister sm,
                       Condition cond) {