Fix Libc++ build with MinGW64

Summary: This patch corrects the build errors I encountered when building on MinGW64.

Reviewers: mati865, rnk, compnerd, smeenai, bcraig

Reviewed By: mati865, smeenai

Subscribers: martell, chapuni, cfe-commits

Differential Revision: https://reviews.llvm.org/D33082

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@304360 91177308-0d34-0410-b5e6-96231b3b80d8

src/new.cpp

@@ -183,7 +183,7 @@ operator new(std::size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC
     if (static_cast<size_t>(alignment) < sizeof(void*))
       alignment = std::align_val_t(sizeof(void*));
     void* p;
-#if defined(_LIBCPP_MSVCRT)
+#if defined(_LIBCPP_MSVCRT_LIKE)
     while ((p = _aligned_malloc(size, static_cast<size_t>(alignment))) == nullptr)
 #else
     while (::posix_memalign(&p, static_cast<size_t>(alignment), size) != 0)
@@ -256,7 +256,7 @@ void
 operator delete(void* ptr, std::align_val_t) _NOEXCEPT
 {
     if (ptr)
-#if defined(_LIBCPP_MSVCRT)
+#if defined(_LIBCPP_MSVCRT_LIKE)
         ::_aligned_free(ptr);
 #else
         ::free(ptr);