Revert "Removed OS dependency error."

This reverts commit 587e5b4.

Author: hash3liZer

wifibroot.py

@@ -603,4 +603,7 @@ def main():
 if __name__ == "__main__":
 	pull = Pully()
 	pull.logo()
+	if not 'linux' in sys.platform:
+		pull.special("Not Supportable Operating System!")
+		sys.exit(1)
 	main()