Merge "added include file to fix gcc 4.8 error"
diff --git a/android/filesystems/testing/TestSupport.cpp b/android/filesystems/testing/TestSupport.cpp
index f084306..9ff57a0 100644
--- a/android/filesystems/testing/TestSupport.cpp
+++ b/android/filesystems/testing/TestSupport.cpp
@@ -18,6 +18,8 @@
 
 #ifdef _WIN32
 #include <windows.h>
+#else
+#include <unistd.h>
 #endif
 
 namespace android {