[Hipcc] Mark ~HipBinBase as virtual (llvm#1258)

Author: jmmartinez

amd/hipcc/src/hipBin_amd.h

@@ -51,7 +51,7 @@ class HipBinAmd : public HipBinBase {
 
  public:
   HipBinAmd();
-  virtual ~HipBinAmd() = default;
+  ~HipBinAmd() override = default;
   virtual bool detectPlatform();
   virtual void constructCompilerPath();
   virtual const string& getCompilerPath() const;

amd/hipcc/src/hipBin_base.h

@@ -203,6 +203,7 @@ enum HipBinCommand {
 class HipBinBase {
  public:
   HipBinBase();
+  virtual ~HipBinBase() = default;
   // Interface functions
   virtual void constructCompilerPath() = 0;
   virtual void printFull() = 0;

amd/hipcc/src/hipBin_nvidia.h

@@ -37,7 +37,7 @@ class HipBinNvidia : public HipBinBase {
 
  public:
   HipBinNvidia();
-  virtual ~HipBinNvidia() = default;
+  ~HipBinNvidia() override = default;
   virtual bool detectPlatform();
   virtual void constructCompilerPath();
   virtual const string& getCompilerPath() const;