wasm: update proxy-wasm-cpp-host (envoyproxy#13606)

The PR updates proxy-wasm-cpp-host dependency for enhancing the capability and fixing a bug in WASM extensions.

The change consists of three PRs in proxy-wasm-cpp-host:

1. proxy-wasm/proxy-wasm-cpp-host#68 @PiotrSikora
2. proxy-wasm/proxy-wasm-cpp-host#65 @mathetake (me)
3. proxy-wasm/proxy-wasm-cpp-host#64 @mathetake (me)

The code change can be found at proxy-wasm/proxy-wasm-cpp-host@49ed20e...c5658d3 .

1 & 2 enhance WASM capability, and 3 fixes a bug in situations where users share vm_id for multiple filters. For details, please take a look at these original PRs.

Signed-off-by: mathetake <takeshi@tetrate.io>
Signed-off-by: Piotr Sikora <piotrsikora@google.com>

bazel/repository_locations.bzl

@@ -869,9 +869,8 @@ DEPENDENCY_REPOSITORIES_SPEC = dict(
         project_name = "WebAssembly for Proxies (C++ host implementation)",
         project_desc = "WebAssembly for Proxies (C++ host implementation)",
         project_url = "https://github.com/proxy-wasm/proxy-wasm-cpp-host",
-        # 2020-09-10
-        version = "49ed20e895b728aae6b811950a2939ecbaf76f7c",
-        sha256 = "fa03293d01450b9164f8f56ef9227301f7d1af4f373f996400f75c93f6ebc822",
+        version = "c5658d34979abece30882b1eeaa95b6ee965d825",
+        sha256 = "dc3a794424b7679c3dbcf23548e202aa01e9f9093791b95446b99e8524e03c4f",
         strip_prefix = "proxy-wasm-cpp-host-{version}",
         urls = ["https://github.com/proxy-wasm/proxy-wasm-cpp-host/archive/{version}.tar.gz"],
         use_category = ["dataplane_ext"],
@@ -882,7 +881,7 @@ DEPENDENCY_REPOSITORIES_SPEC = dict(
             "envoy.filters.network.wasm",
             "envoy.stat_sinks.wasm",
         ],
-        last_updated = "2020-07-29",
+        last_updated = "2020-10-16",
         cpe = "N/A",
     ),
     # TODO: upgrade to the latest version (1.41 currently fails tests)