Auto merge of #41505 - alexcrichton:stable-next, r=alexcrichton

[stable] Prepare the 1.17.0 release

* Update channel we're building
* Update the cargo submodule to the tip of the `rust-1.17.0` branch
diff --git a/cargo b/cargo
index d8d0940..fe7b0cd 160000
--- a/cargo
+++ b/cargo
@@ -1 +1 @@
-Subproject commit d8d0940a97a83ed2e4eb340cafea4ed7f601f158
+Subproject commit fe7b0cdcf5ca7aab81630706ce40b70f6aa2e666
diff --git a/src/ci/run.sh b/src/ci/run.sh
index 1cd1736..228880f 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -41,7 +41,7 @@
 # FIXME: need a scheme for changing this `nightly` value to `beta` and `stable`
 #        either automatically or manually.
 if [ "$DEPLOY$DEPLOY_ALT" != "" ]; then
-  RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=beta"
+  RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=stable"
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-llvm-static-stdcpp"
 
   if [ "$NO_LLVM_ASSERTIONS" = "1" ]; then