init should #include <sys/sysmacros.h>

Bug: https://github.com/android-ndk/ndk/issues/398
Test: builds
Change-Id: I6428a6344a3ce649bd03ff9e9b0f156425c67f0c
diff --git a/init/devices.cpp b/init/devices.cpp
index d8258cf..e0351a3 100644
--- a/init/devices.cpp
+++ b/init/devices.cpp
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <sys/sendfile.h>
 #include <sys/socket.h>
+#include <sys/sysmacros.h>
 #include <sys/time.h>
 #include <sys/un.h>
 #include <sys/wait.h>