Move bionic_macros.h from private to platform.

Test: treehugger
Change-Id: Ie473914f4c8924c7240b3ac22093a9daf42fc948
diff --git a/libc/malloc_debug/MapData.h b/libc/malloc_debug/MapData.h
index 5b08b90..f2b3c1c 100644
--- a/libc/malloc_debug/MapData.h
+++ b/libc/malloc_debug/MapData.h
@@ -34,7 +34,7 @@
 #include <set>
 #include <string>
 
-#include <private/bionic_macros.h>
+#include <platform/bionic/macros.h>
 
 struct MapEntry {
   MapEntry(uintptr_t start, uintptr_t end, uintptr_t offset, const char* name, size_t name_len, int flags)