Update .arcconfig

llvm-svn: 276214
diff --git a/libunwind/.arcconfig b/libunwind/.arcconfig
index ef07b36..97a4bf1 100644
--- a/libunwind/.arcconfig
+++ b/libunwind/.arcconfig
@@ -1,4 +1,4 @@
 {
   "project_id" : "libunwind",
-  "conduit_uri" : "http://reviews.llvm.org/"
+  "conduit_uri" : "https://reviews.llvm.org/"
 }