Add missing move constructor and move assignment

commit_hash:ca0a881f294c00b673673335c9366699c4be7c86

Author: eivanov89

library/cpp/histogram/hdr/histogram.cpp

@@ -44,6 +44,18 @@ namespace NHdr {
     {
     }
 
+    THistogram::THistogram(THistogram&& other) noexcept
+        : Data_(std::move(other.Data_))
+        , Allocator_(other.Allocator_)
+    {
+    }
+
+    THistogram& THistogram::operator=(THistogram&& rhs) noexcept {
+        Data_ = std::move(rhs.Data_);
+        Allocator_ = rhs.Allocator_;
+        return *this;
+    }
+
     THistogram::~THistogram() {
         if (Data_) {
             size_t size = GetMemorySize();

library/cpp/histogram/hdr/histogram.h

@@ -68,6 +68,9 @@ namespace NHdr {
                    i32 numberOfSignificantValueDigits,
                    IAllocator* allocator = TDefaultAllocator::Instance());
 
+        THistogram(THistogram&& other) noexcept;
+        THistogram& operator=(THistogram&& rhs) noexcept;
+
         ~THistogram();
 
         // Histogram structure querying support -----------------------------------