Enable https for test-suite.

llvm-svn: 275479
diff --git a/.arcconfig b/.arcconfig
index 38f84f8..f2e9508 100644
--- a/.arcconfig
+++ b/.arcconfig
@@ -1,4 +1,4 @@
 {
   "project_id" : "test-suite",
-  "conduit_uri" : "http://reviews.llvm.org/"
+  "conduit_uri" : "https://reviews.llvm.org/"
 }