adb: fix windows test build.

The switch over to soong unintentionally turned off building the
Windows tests (and there's a bug preventing them from being turned on).
Preemptively fix the build breakages that'll happen when we turn them
back on.

Test: mma with Android.bp 's/cc_test_host/cc_binary_host' hacks
Change-Id: I6582cfc61b96052537d50d8ba90533dbb66e3e1d
diff --git a/adb/fdevent_test.cpp b/adb/fdevent_test.cpp
index 95dc4c2..e3d5a35 100644
--- a/adb/fdevent_test.cpp
+++ b/adb/fdevent_test.cpp
@@ -26,6 +26,7 @@
 
 #include "adb_io.h"
 #include "fdevent_test.h"
+#include "sysdeps/memory.h"
 
 class FdHandler {
   public: