Subzero: Update tests and build scripts for sandboxing.

src/IceTargetLowering.cpp

Index: src/IceTargetLowering.cpp
diff --git a/src/IceTargetLowering.cpp b/src/IceTargetLowering.cpp
index 461b08625734510f0cd2f8689b0dfc7df57a3e09..d2da33344754d0e4e0843e0aaa3372ae6f59f4a2 100644
--- a/src/IceTargetLowering.cpp
+++ b/src/IceTargetLowering.cpp
@@ -105,7 +105,7 @@ TargetLowering::TargetLowering(Cfg *Func)
     : Func(Func), Ctx(Func->getContext()),
       RandomizeRegisterAllocation(CLRandomizeRegisterAllocation),
       HasComputedFrame(false), CallsReturnsTwice(false), StackAdjustment(0),
-      Context() {}
+      Context(), SnapshotStackAdjustment(0) {}
 
 std::unique_ptr<Assembler> TargetLowering::createAssembler(TargetArch Target,
                                                            Cfg *Func) {