Add hadrian as a submodule

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

Add hadrian as a submodule
4335c07c · Ben Gamari · 7733e44d · 4335c07c · 86216e24
Commit 4335c07c authored 7 years ago by Ben Gamari
--- 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
--- a/hadrian @ 86216e24
+++ b/hadrian @ 86216e24
+Subproject commit 86216e249f307a778bef3755afb7474910bc60cc