[lib] update all libraries to latest nightly

hawkw · hawkw · commit ff89e46e2f93 · 2016-04-02T14:15:16.000-04:00
diff --git a/lib/liballoc b/lib/liballoc
@@ -1 +1 @@
-Subproject commit 311b49b40500ebd35a3dd5dd5ced432fd57ffc10
+Subproject commit ec6c28e335b90767c087c93d67dbb8f4c9ff00c9
diff --git a/lib/libcollections b/lib/libcollections
@@ -1 +1 @@
-Subproject commit 8851d677fce60288a51aa073f14498d36479332a
+Subproject commit 9c4aeb4c7d68872a2a276bee168e4fc8806303f8
diff --git a/lib/libcore b/lib/libcore
@@ -1 +1 @@
-Subproject commit 4dddc148e82276a965666aac05fe954778942799
+Subproject commit eb9da506aeb58557e2bd7e9be0c4b54dc14aa446
diff --git a/lib/librustc_unicode b/lib/librustc_unicode
@@ -1 +1 @@
-Subproject commit cee655584a4a35dc3a8221f875da30c3e69799f8
+Subproject commit aa81429389ea6181cdcb3b936c473449054790ef
