base58: Making check-source happy again

Trailing whitespace and include ordering was broken.

bitcoin/base58.c

@@ -5,11 +5,11 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include "address.h"
 #include "base58.h"
+#include "libbase58/libbase58.h"
 #include "privkey.h"
 #include "pubkey.h"
 #include "shadouble.h"
 #include "utils.h"
-#include "libbase58/libbase58.h"
 #include <assert.h>
 #include <ccan/build_assert/build_assert.h>
 #include <ccan/tal/str/str.h>