update check_submodules.sh and podspec template

templates/src/objective-c/BoringSSL-GRPC.podspec.template

@@ -81,7 +81,7 @@
 
     s.source = {
       :git => 'https://github.com/google/boringssl.git',
-      :commit => "b29b21a81b32ec273f118f589f46d56ad3332420",
+      :commit => "2e0d354690064c90ee245c715b92e2bb32492571",
     }
 
     s.ios.deployment_target = '7.0'

tools/run_tests/sanity/check_submodules.sh

@@ -29,8 +29,8 @@ cat << EOF | awk '{ print $1 }' | sort > "$want_submodules"
  74d91756c11bc22f9b0108b94da9326f7f9e376f third_party/abseil-cpp (74d9175)
  090faecb454fbd6e6e17a75ef8146acb037118d4 third_party/benchmark (v1.5.0)
  73594cde8c9a52a102c4341c244c833aa61b9c06 third_party/bloaty (remotes/origin/wide-14-g73594cd)
- b29b21a81b32ec273f118f589f46d56ad3332420 third_party/boringssl (remotes/origin/chromium-stable)
- afc30d43eef92979b05776ec0963c9cede5fb80f third_party/boringssl-with-bazel (fips-20180716-116-gafc30d43e)
+ 2e0d354690064c90ee245c715b92e2bb32492571 third_party/boringssl (remotes/origin/chromium-stable)
+ a21f78d24bf645ccd6774b2c7e52e3c0514f7f29 third_party/boringssl-with-bazel (remotes/origin/chromium-stable-with-bazel)
  e982924acee7f7313b4baa4ee5ec000c5e373c30 third_party/cares/cares (cares-1_15_0)
  c181f78882e54c0e5c63f332562ef6954ee7932f third_party/envoy-api (heads/master)
  28f50e0fed19872e0fd50dd23ce2ee8cd759338e third_party/gflags (v2.2.0-5-g30dbc81)