Bump Envoy version: a82962c

[Augustyniak]

Picking up the following changes envoyproxy/envoy@57bfbda...a82962c

There was an error:

external/envoy/source/common/buffer/watermark_buffer.cc:5:10: fatal error: 'absl/numeric/bits.h' file not found
#include "absl/numeric/bits.h"

which we were able to get rid of by updating com_google_absl dependency.

Description:
Risk Level: Low
Testing: N/A
Docs Changes: N/A
Release Notes: N/A
[Optional Fixes #Issue]
[Optional Deprecated:]

[buildbreaker]

Thanks @Augustyniak !

[goaway]

Thanks @Augustyniak and @snowp!

[ulfjack]

FYI: The failure of ios_build_shadow was caused by me making a change to the CI. Please ignore.

[goaway]

🤞

[Augustyniak]

I need to update Envoy again since the current version of Envoy makes iOS/Android hello world application crash:

[2021-08-06 15:39:47.049][1052159][critical][assert] [external/envoy/source/server/proto_descriptors.cc:49] assert failure: Protobuf::DescriptorPool::generated_pool()->FindMessageTypeByName(type) != nullptr. Details: envoy.api.v2.Cluster

Envoy issues were fixed in upstream Envoy as part of envoyproxy/envoy#17622.

[goaway]

Thanks @Augustyniak!

[Augustyniak]

Just a note about why we needed to add new linker flags as part of this PR.

We needed to add:

build:clang-asan --linkopt --rtlib=compiler-rt
build:clang-asan --linkopt --unwindlib=libgcc

since without these additional asan job was failing with the following error:

Execution platform: @local_config_platform//:host
ld.lld: error: undefined symbol: __muloti4
>>> referenced by numbers.cc
>>>               bazel-out/k8-fastbuild/bin/external/com_google_absl/absl/strings/_objs/strings/numbers.pic.o:(absl::operator*(absl::int128, absl::int128))
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)