JitBase: Put constructor and destructor in the cpp file

As this is a base class with virtuals, there needs to be an out-of-line
function definition to prevent the vtable of the class being placed within
every translation unit it's used in (i.e. every JIT implementation).

Source/Core/Core/PowerPC/JitCommon/JitBase.cpp

@@ -23,6 +23,10 @@ u32 Helper_Mask(u8 mb, u8 me)
   return mb > me ? ~mask : mask;
 }
 
+JitBase::JitBase() = default;
+
+JitBase::~JitBase() = default;
+
 bool JitBase::MergeAllowedNextInstructions(int count)
 {
   if (CPU::GetState() == CPU::CPU_STEPPING || js.instructionsLeft < count)

Source/Core/Core/PowerPC/JitCommon/JitBase.h

@@ -114,6 +114,9 @@ public:
   JitOptions jo;
   JitState js;
 
+  JitBase();
+  ~JitBase() override;
+
   static const u8* Dispatch() { return g_jit->GetBlockCache()->Dispatch(); };
   virtual JitBaseBlockCache* GetBlockCache() = 0;