[commit: ghc] ghc-8.4: Add hadrian as a submodule (2278c4c)

[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/2278c4c752717d2a5784ac4fe6a41a051225d1b8/ghc

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

commit 2278c4c752717d2a5784ac4fe6a41a051225d1b8
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Fri Dec 8 13:02:06 2017 -0500

    Add hadrian as a submodule
    
    It will remain a submodule until we are ready to merge Hadrian into the
    tree.


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

2278c4c752717d2a5784ac4fe6a41a051225d1b8
 .gitmodules | 3 +++
 hadrian     | 1 +
 2 files changed, 4 insertions(+)

diff --git a/.gitmodules b/.gitmodules
index f5ec0ef..2125a92 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -129,3 +129,6 @@
 [submodule ".arc-linters/arcanist-external-json-linter"]
 	path = .arc-linters/arcanist-external-json-linter
 	url = ../arcanist-external-json-linter.git
+[submodule "hadrian"]
+	path = hadrian
+	url = ../hadrian.git
diff --git a/hadrian b/hadrian
new file mode 160000
index 0000000..86216e2
--- /dev/null
+++ b/hadrian
@@ -0,0 +1 @@
+Subproject commit 86216e249f307a778bef3755afb7474910bc60cc