[build] try to fix missing include

src/fs-extension-functions.cc

@@ -35,6 +35,8 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <sys/param.h>
+#include <stdlib.h>
 
 #include <string>
 #include <stddef.h>