video_core: Add missing override specifiers

src/video_core/renderer_opengl/gl_sampler_cache.h

@@ -17,9 +17,9 @@ public:
     ~SamplerCacheOpenGL();
 
 protected:
-    OGLSampler CreateSampler(const Tegra::Texture::TSCEntry& tsc) const;
+    OGLSampler CreateSampler(const Tegra::Texture::TSCEntry& tsc) const override;
 
-    GLuint ToSamplerType(const OGLSampler& sampler) const;
+    GLuint ToSamplerType(const OGLSampler& sampler) const override;
 };
 
 } // namespace OpenGL

src/video_core/renderer_vulkan/vk_sampler_cache.h

@@ -21,9 +21,9 @@ public:
     ~VKSamplerCache();
 
 protected:
-    UniqueSampler CreateSampler(const Tegra::Texture::TSCEntry& tsc) const;
+    UniqueSampler CreateSampler(const Tegra::Texture::TSCEntry& tsc) const override;
 
-    vk::Sampler ToSamplerType(const UniqueSampler& sampler) const;
+    vk::Sampler ToSamplerType(const UniqueSampler& sampler) const override;
 
 private:
     const VKDevice& device;