Roll mac_toolchain to latest version in depot_tools

To include recent changes:
- crrev/c/2680852 : Ensure Xcode.app intact at installing.
- crrev/c/2676139 : Do not upload iOS simulator runtimes for Mac.

Bug: 1064615
Change-Id: I9874c7b3664dd20745a772d52a682e552e6c0af8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2689105
Auto-Submit: Zhaoyang Li <zhaoyangli@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@google.com>
Reviewed-by: Andrii Shyshkalov <tandrii@google.com>

cipd_manifest.txt

@@ -39,7 +39,7 @@ infra/tools/luci/led/${platform} git_revision:1492a186ef3a210e9d2bd824a2e6dee6b3
 infra/tools/luci/lucicfg/${platform} git_revision:f3c1280c18afc6bba9ba9884668408e07ef0512d
 
 # Mac toolchain installer
-infra/tools/mac_toolchain/${os=mac}-${arch} git_revision:6e584bf785867bc3b340f82bb2f7a6cd42ba22a8
+infra/tools/mac_toolchain/${os=mac}-${arch} git_revision:8811b82233df02ee372cae1e19e379ca8c6a2776
 
 # LUCI rpc command line tool
 infra/tools/prpc/${platform} git_revision:1492a186ef3a210e9d2bd824a2e6dee6b3c7a485

cipd_manifest.versions

@@ -330,8 +330,8 @@ infra/tools/luci/vpython/windows-amd64
 	qJhMxXrlHDCoQqWyi4PV9R09xKwTIxXux-arbuLgvrQC
 
 infra/tools/mac_toolchain/mac-amd64
-	git_revision:6e584bf785867bc3b340f82bb2f7a6cd42ba22a8
-	wHJfq70TBoff204UUKBQmxSKrGa5hEpHFjd5IX5Q0EEC
+	git_revision:8811b82233df02ee372cae1e19e379ca8c6a2776
+	jG64q5ZTG9M9pCrAtrc7U-OnlnHBT-R-tlzpoH5Ac0kC
 
 infra/tools/prpc/linux-386
 	git_revision:1492a186ef3a210e9d2bd824a2e6dee6b3c7a485