[commit: ghc] ghc-8.4: Bump hadrian submodule (99d3e39)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-8.4
Link       : http://ghc.haskell.org/trac/ghc/changeset/99d3e39f1d82f332351cbae602f460b42f7d62fe/ghc

>---------------------------------------------------------------

commit 99d3e39f1d82f332351cbae602f460b42f7d62fe
Author: Ryan Scott <ryan.gl.scott at gmail.com>
Date:   Fri Feb 16 13:51:27 2018 -0500

    Bump hadrian submodule


>---------------------------------------------------------------

99d3e39f1d82f332351cbae602f460b42f7d62fe
 hadrian | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hadrian b/hadrian
index 86216e2..63a5563 160000
--- a/hadrian
+++ b/hadrian
@@ -1 +1 @@
-Subproject commit 86216e249f307a778bef3755afb7474910bc60cc
+Subproject commit 63a556382f4b3154ed2ce3a6c8a36f79d9b8e3b1