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..1fa3ce24285db490a96f5d38da027095531024e8 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -323,7 +323,8 @@ public:
     return std::unique_ptr<TargetDataLowering>(new TargetDataARM32(Ctx));
   }
 
-  void lowerGlobals(std::unique_ptr<VariableDeclarationList> Vars) override;
+  void lowerGlobals(const VariableDeclarationList &Vars,
+                    const IceString &SectionSuffix) override;
   void lowerConstants() override;
 
 protected: