Move bionic_macros.h from private to platform.

Test: treehugger
Change-Id: Ie473914f4c8924c7240b3ac22093a9daf42fc948
diff --git a/libc/bionic/system_property_set.cpp b/libc/bionic/system_property_set.cpp
index e981a58..56822ac 100644
--- a/libc/bionic/system_property_set.cpp
+++ b/libc/bionic/system_property_set.cpp
@@ -45,7 +45,7 @@
 #include <async_safe/CHECK.h>
 
 #include "private/bionic_defs.h"
-#include "private/bionic_macros.h"
+#include "platform/bionic/macros.h"
 #include "private/ScopedFd.h"
 
 static const char property_service_socket[] = "/dev/socket/" PROP_SERVICE_NAME;