DebugTools: use Utility::copy() instead of std::copy().

Again due to <string> pulling in some parts of <algorithm>. When it gets
removed, I'd have to include <algorithm> myself.

src/Magnum/DebugTools/BufferData.cpp

@@ -26,11 +26,12 @@
 #include "BufferData.h"
 
 #ifndef MAGNUM_TARGET_WEBGL
+#include <Corrade/Utility/Algorithms.h>
+
 namespace Magnum { namespace DebugTools { namespace Implementation {
 
 void bufferSubData(GL::Buffer& buffer, GLintptr offset, GLsizeiptr size, void* output) {
-    Containers::ArrayView<const char> data = buffer.mapRead(offset, size);
-    std::copy(data.begin(), data.end(), reinterpret_cast<char*>(output));
+    Utility::copy(buffer.mapRead(offset, size), Containers::ArrayView<char>{static_cast<char*>(output), std::size_t(size)});
     buffer.unmap();
 }