Add a SHA512 implementation

[ccan] / ccan / crypto / sha512 / LICENSE

diff --git a/ccan/crypto/sha512/LICENSE b/ccan/crypto/sha512/LICENSE
new file mode 120000 (symlink)
index 0000000..2b1feca
--- /dev/null
+++ b/ccan/crypto/sha512/LICENSE
@@ -0,0 +1 @@
+../../../licenses/BSD-MIT
\ No newline at end of file