NFC: Fix -Wdeprecated-copy warnings

include/swift/Reflection/Records.h

@@ -266,6 +266,8 @@ struct AssociatedTypeRecordIterator {
     return *this;
   }
 
+  AssociatedTypeRecordIterator(const AssociatedTypeRecordIterator &Other)
+      : Cur(Other.Cur), End(Other.End) {}
   AssociatedTypeRecordIterator
   operator=(const AssociatedTypeRecordIterator &Other) {
     return { Other.Cur, Other.End };

lib/IDE/Formatting.cpp

@@ -564,6 +564,10 @@ class FormatWalker : public SourceEntityWalker {
     public:
       SourceLocIterator(TokenIt It) :It(It) {}
       SourceLocIterator(const SourceLocIterator& mit) : It(mit.It) {}
+      const SourceLocIterator &operator=(const SourceLocIterator &mit) {
+        It = mit.It;
+        return *this;
+      }
       SourceLocIterator& operator++() {++It; return *this;}
       SourceLocIterator operator++(int) {
         SourceLocIterator tmp(*this);

lib/SILOptimizer/IPO/CapturePromotion.cpp

@@ -160,6 +160,8 @@ class ReachingBlockSet {
     return !(*this == RHS);
   }
 
+  ReachingBlockSet(const ReachingBlockSet &RHS)
+      : Bits(RHS.Bits), NumBitWords(RHS.NumBitWords) {}
   const ReachingBlockSet &operator=(const ReachingBlockSet &RHS) {
     assert(NumBitWords == RHS.NumBitWords && "mismatched sets");
     for (size_t i = 0, e = NumBitWords; i != e; ++i)

lib/Sema/InstrumenterSupport.h

@@ -28,7 +28,8 @@ template <class E> class Added {
 
 public:
   Added() {}
-  Added(E NewContents) { Contents = NewContents; }
+  Added(E NewContents) : Contents(NewContents) {}
+  Added(const Added<E> &rhs) : Contents(rhs.Contents) {}
   const Added<E> &operator=(const Added<E> &rhs) {
     Contents = rhs.Contents;
     return *this;