[libc++] Move the definition of aligned allocation helpers outside of <new>
They are not needed in <new> -- in fact they are only needed in .cpp files.
Getting those out of the way makes the headers smaller and also makes it
easier to use the library on platforms where aligned allocation is not
available.
Differential Revision: https://reviews.llvm.org/D139231
NOKEYCHECK=True
GitOrigin-RevId: 36080434a8858c33f2af2382be748caed131385f
diff --git a/src/fallback_malloc.cpp b/src/fallback_malloc.cpp
index 591efbe..f9fb1bc 100644
--- a/src/fallback_malloc.cpp
+++ b/src/fallback_malloc.cpp
@@ -15,10 +15,10 @@
#endif
#endif
+#include <__memory/aligned_alloc.h>
#include <assert.h>
#include <stdlib.h> // for malloc, calloc, free
#include <string.h> // for memset
-#include <new> // for std::__libcpp_aligned_{alloc,free}
// A small, simple heap manager based (loosely) on
// the startup heap manager from FreeBSD, optimized for space.