Various fixes related to integer negate operations.

- Emit an RSB instruction for HNeg nodes in the ARM code
  generator instead of RSBS, as we do not need to update the
  condition code flags in this case.
- Simply punt when trying to statically evaluate a long
  unary operation, instead of aborting.
- Move a test case to the right place.

Change-Id: I35eb8dea58ed35258d4d8df77181159c3ab07b6f
diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index 24b7c2d..f07cb30 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -1065,7 +1065,7 @@
   switch (neg->GetResultType()) {
     case Primitive::kPrimInt:
       DCHECK(in.IsRegister());
-      __ rsbs(out.As<Register>(), in.As<Register>(), ShifterOperand(0));
+      __ rsb(out.As<Register>(), in.As<Register>(), ShifterOperand(0));
       break;
 
     case Primitive::kPrimLong: