Update Rust and Clang.

May fix the linux and linux_prefixed builders.

Change-Id: Id4d56a2a41e725061ef5b81550fb9fb26a6a6964
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/100607
Commit-Queue: Xiangfei Ding <xfding@google.com>
Presubmit-BoringSSL-Verified: boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com <boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Rudolf Polzer <rpolzer@google.com>
Reviewed-by: Xiangfei Ding <xfding@google.com>

util/bot/DEPS

diff --git a/util/bot/DEPS b/util/bot/DEPS
index 22fcc02..216739c 100644
--- a/util/bot/DEPS
+++ b/util/bot/DEPS
@@ -70,12 +70,12 @@
 
   # Update to the latest revision of
   # https://chromium.googlesource.com/chromium/src/tools/clang
-  'tools_clang_revision': '956f5b673f981d317e4c5d2d01a43a7f56259557',
+  'tools_clang_revision': 'e4816757c45a072f08279139108a0a937bbeb239',
 
   # Update to the latest revision of
   # https://chromium.googlesource.com/chromium/src/tools/rust
   # and also ensure that `tools_clang_revision` above is up-to-date.
-  'tools_rust_revision': '69bb79a132d32d67b6f6820226b02e50f1945202',
+  'tools_rust_revision': '285104ac97c055afdc632b9c02af223ef738ad87',
 }
 
 deps = {