Update Envoy to 3147d91a40d6aca684cfb4fd159c8876995502d1 (#2035)

Signed-off-by: Otto van der Schaaf <oschaaf@we-amp.com>
diff --git a/.bazelrc b/.bazelrc
index 9105a0b..ff93d41 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -32,6 +32,8 @@
 build:linux --copt=-fPIC
 build:linux --cxxopt=-std=c++17
 build:linux --conlyopt=-fexceptions
+build:linux --fission=dbg,opt
+build:linux --features=per_object_debug_info
 
 # We already have absl in the build, define absl=1 to tell googletest to use absl for backtrace.
 build --define absl=1
@@ -330,7 +332,7 @@
 #build --copt=-fno-addrsig 
 
 build:clang-asan --linkopt=-fno-sanitize=alignment
-build:clang-asan --copt=-fno-sanitize=alignment
+build:asan --copt=-fno-sanitize=alignment
 build:clang-asan --copt=-fno-omit-frame-pointer
 
 test --test_env=REDIS_PORT=6379
diff --git a/bazel/repositories.bzl b/bazel/repositories.bzl
index 321d86a..aae1b77 100644
--- a/bazel/repositories.bzl
+++ b/bazel/repositories.bzl
@@ -13,8 +13,8 @@
 load(":serf.bzl", "serf_build_rule")
 load(":closure_compiler.bzl", "closure_library_rules")
 
-ENVOY_COMMIT = "2a4f7dae855ef81376a8aee6201ea19ea36ef8e2"  # August 12th, 2020
-ENVOY_SHA = "88d0eaca79178b6ab1c1443dfc23fb5cad0c9559ad3272a3114f3fb1bd905592"
+ENVOY_COMMIT = "3147d91a40d6aca684cfb4fd159c8876995502d1"  # August 20th, 2020
+ENVOY_SHA = "fce665401000734d20f35d895e46097db37fff427a2d882759bdeeece1857c88"
 BROTLI_COMMIT = "d6d98957ca8ccb1ef45922e978bb10efca0ea541"
 BROTLI_SHA = "ba8be5d701b369f86d14f3701c81d6bf6c6c34015c183ff98352c12ea5f5226b"
 HIREDIS_COMMIT = "0.14.1"  # July 24th, 2020