Object: Add Archive::getNumberOfSymbols().

Add a function that returns number of symbols in archive headers.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238213 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Object/Archive.h

@@ -207,6 +207,7 @@ public:
 
   bool hasSymbolTable() const;
   child_iterator getSymbolTableChild() const { return SymbolTable; }
+  uint32_t getNumberOfSymbols() const;
 
 private:
   child_iterator SymbolTable;