bionic supplies PR_SET_VMA now.

Bug: N/A
Test: builds
Change-Id: I8254711543cbf11bdf905ea441655ca1c1e82aac
diff --git a/libmemunreachable/PtracerThread.cpp b/libmemunreachable/PtracerThread.cpp
index 61a1d24..d2fca49 100644
--- a/libmemunreachable/PtracerThread.cpp
+++ b/libmemunreachable/PtracerThread.cpp
@@ -24,6 +24,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
+#include <sys/prctl.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <sys/wait.h>
@@ -32,7 +33,6 @@
 #include "android-base/macros.h"
 
 #include "PtracerThread.h"
-#include "anon_vma_naming.h"
 #include "log.h"
 
 namespace android {