Fix a bug that would cause subzero to fail when --threads=0.

src/IceTargetLoweringARM32.h

Index: src/IceTargetLoweringARM32.h
diff --git a/src/IceTargetLoweringARM32.h b/src/IceTargetLoweringARM32.h
index 98dd20e3e4e4d3d7a6142efbac95c465363a9af5..8e237d17a7e48342d6109fee338c3c50fb7de701 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -323,8 +323,9 @@ public:
     return std::unique_ptr<TargetDataLowering>(new TargetDataARM32(Ctx));
   }
 
-  void lowerGlobals(std::unique_ptr<VariableDeclarationList> Vars) override;
-  void lowerConstants() override;
+  void lowerGlobals(const VariableDeclarationList &Vars,
+                    const IceString &SectionSuffix) override;
+  void lowerConstants(const IceString &SectionSuffix) override;
 
 protected:
   explicit TargetDataARM32(GlobalContext *Ctx);