Update relnotes for 1.15.1

I already checked this into stable, but it needs to be on master/beta too.

diff --git a/RELEASES.md b/RELEASES.md
index 99d6b7709ede989bb5b478f4972cd85b299b1772..f26c0b6b6116194cd1fbc74fb64fa4d384b08239 100644 (file)
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,11 @@
+Version 1.15.1 (2017-02-07)
+===========================
+
+* [Fix IntoIter::as_mut_slice's signature][39466]
+
+[39466]: https://github.com/rust-lang/rust/pull/39466
+
+
 Version 1.15.0 (2017-02-02)
 ===========================