Move bionic_macros.h from private to platform.

Test: treehugger
Change-Id: Ie473914f4c8924c7240b3ac22093a9daf42fc948
diff --git a/libc/malloc_debug/RecordData.h b/libc/malloc_debug/RecordData.h
index a015882..3d37529 100644
--- a/libc/malloc_debug/RecordData.h
+++ b/libc/malloc_debug/RecordData.h
@@ -36,7 +36,7 @@
 #include <mutex>
 #include <string>
 
-#include <private/bionic_macros.h>
+#include <platform/bionic/macros.h>
 
 class RecordEntry {
  public: