Add missing #include <memory> for std::unique_ptr on Windows.

Change-Id: Ic02f53003a20a646cbbf2aa08e0e10be9bd8b97f
diff --git a/adb/file_sync_client.cpp b/adb/file_sync_client.cpp
index c37c6dd..b928659 100644
--- a/adb/file_sync_client.cpp
+++ b/adb/file_sync_client.cpp
@@ -27,6 +27,8 @@
 #include <time.h>
 #include <utime.h>
 
+#include <memory>
+
 #include "sysdeps.h"
 
 #include "adb.h"