Make private/bionic_page.h available as platform/bionic/page.h.

Bug: http://b/145825270
Test: treehugger
Change-Id: I52958f370c0df2c02cb8250e2cf0705d4e93e908
diff --git a/linker/linker.h b/linker/linker.h
index 89390b3..789640c 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -36,7 +36,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-#include "private/bionic_page.h"
+#include "platform/bionic/page.h"
 #include "linked_list.h"
 #include "linker_common_types.h"
 #include "linker_logger.h"