Use std placement new on non MSVC compilers

Author: ShortDevelopment

lib/Common/Memory/Allocator.h

@@ -1,5 +1,6 @@
 //-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
+// Copyright (c) ChakraCore Project Contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------
 #pragma once
@@ -448,14 +449,16 @@ void AssertValue(void * mem, T value, uint byteCount)
 #define NO_EXPORT(x) x
 #endif
 
+#if defined(_MSC_VER) && !defined(__clang__)
+
 // For the debugger extension, we don't need the placement news
 #ifndef __PLACEMENT_NEW_INLINE
 #define __PLACEMENT_NEW_INLINE
 
 _Ret_notnull_
 NO_EXPORT(inline void *) __cdecl
 operator new(
-DECLSPEC_GUARD_OVERFLOW size_t byteSize,
+    DECLSPEC_GUARD_OVERFLOW size_t byteSize,
 _In_ void * previousAllocation) throw()
 {
     return previousAllocation;
@@ -466,13 +469,21 @@ NO_EXPORT(inline void) __cdecl
 operator delete(
 void * allocationToFree,                // Allocation to free
 void * previousAllocation               // Previously allocated memory
-) throw()
+    ) throw()
 {
 
 }
 
 #endif
 
+#else
+
+// Use std inline placement new instead of custom
+// See PR #7009
+#include <new>
+
+#endif
+
 //----------------------------------------
 // throwing operator new overrides
 //----------------------------------------