Fix build with newer linux headers

Change-Id: Ibfdcec60567ec357205fa137257f2d8cba44b01c
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 161e3c5..d467da7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -84,7 +84,7 @@
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
 
-include(cmake/memfd.cmake)
+include(cmake/syscall.cmake)
 include(cmake/api.cmake)
 include(cmake/library.cmake)
 include(cmake/exec.cmake)