bazel: add note about running sanitizers on os x (#6111)
bazel: add note about running sanitizers on os x (#6111)

Signed-off-by: Snow Pettersen <18824beaba694b0802bee531b635db27ba08e6bb@squareup.com>
istio/envoy,lyft/envoy,eklitzke/envoy,dnoe/envoy,dnoe/envoy,jrajahalme/envoy,istio/envoy,envoyproxy/envoy-wasm,lyft/envoy,lyft/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,lyft/envoy,lizan/envoy,eklitzke/envoy,eklitzke/envoy,dnoe/envoy,istio/envoy,istio/envoy,envoyproxy/envoy,eklitzke/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,lizan/envoy,lizan/envoy,lizan/envoy,jrajahalme/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy,dnoe/envoy,dnoe/envoy,envoyproxy/envoy,jrajahalme/envoy,lyft/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lyft/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,lizan/envoy