[java-atk-wrapper] Fix compiling issues

[Samuel Thibault <sthibaul src gnome org>]

commit c8c18ebb0feb2324de89aa8829dd4ff1ca51fc15
Author: Giuseppe <giuseppecapaldo93 gmail com>
Date:   Tue Jul 9 01:16:54 2019 +0200

    Fix compiling issues

 jni/src/jawutil.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/jni/src/jawutil.h b/jni/src/jawutil.h
index 9e5269e..2348d5b 100644
--- a/jni/src/jawutil.h
+++ b/jni/src/jawutil.h
@@ -22,6 +22,7 @@
 
 #include <jni.h>
 #include <atk/atk.h>
+#include <unistd.h>
 #include <time.h>
 
 extern gboolean jaw_debug;