Move bionic_macros.h from private to platform.

Test: treehugger
Change-Id: Ie473914f4c8924c7240b3ac22093a9daf42fc948
diff --git a/libc/bionic/bionic_allocator.cpp b/libc/bionic/bionic_allocator.cpp
index 7fd7067..b6d6ba7 100644
--- a/libc/bionic/bionic_allocator.cpp
+++ b/libc/bionic/bionic_allocator.cpp
@@ -41,7 +41,7 @@
 #include <async_safe/CHECK.h>
 
 #include "platform/bionic/page.h"
-#include "private/bionic_macros.h"
+#include "platform/bionic/macros.h"
 
 //
 // BionicAllocator is a general purpose allocator designed to provide the same