Include <sys/resource.h> for rlimit.

Change-Id: I0e487f8191e284052d8b82eb942d723147d780a1
diff --git a/runtime/native/dalvik_system_ZygoteHooks.cc b/runtime/native/dalvik_system_ZygoteHooks.cc
index 5455daa..2af5324 100644
--- a/runtime/native/dalvik_system_ZygoteHooks.cc
+++ b/runtime/native/dalvik_system_ZygoteHooks.cc
@@ -25,6 +25,8 @@
 #include <sys/prctl.h>
 #endif
 
+#include <sys/resource.h>
+
 namespace art {
 
 static void EnableDebugger() {