niv nixpkgs-mozilla: update c72bae86 -> 1ca9ee71 (#4155)

## Changelog for nixpkgs-mozilla:
Branch: pull/309/head
Commits: [mozilla/nixpkgs-mozilla@c72bae86...1ca9ee71](mozilla/nixpkgs-mozilla@c72bae8...1ca9ee7)

* [`b8fb014c`](mozilla/nixpkgs-mozilla@b8fb014) Patch glxtest and vaapitest added to probe hardware when Firefox is started.
* [`c7104980`](mozilla/nixpkgs-mozilla@c710498) Update the GPG key which is used to sign Firefox releases.
* [`e6ca26fe`](mozilla/nixpkgs-mozilla@e6ca26f) Update gpg incantations to work with 2.4.1
* [`0eb84fdf`](mozilla/nixpkgs-mozilla@0eb84fd) doc: fix flake overlay path description
* [`3a44b878`](mozilla/nixpkgs-mozilla@3a44b87) doc: fix typo
* [`cadfc54b`](mozilla/nixpkgs-mozilla@cadfc54) overlays.rust: fix fromManifest postBuild chmod for rust-src build
* [`db89c870`](mozilla/nixpkgs-mozilla@db89c87) overlays.rust: fix fromManifest postBuild realpath for rust-src build
* [`1ca9ee71`](mozilla/nixpkgs-mozilla@1ca9ee7) use `stdenv.hostPlatform.extensions.sharedLibrary` to remove duplicated copying

nix/sources.json

@@ -128,10 +128,10 @@
         "homepage": null,
         "owner": "mozilla",
         "repo": "nixpkgs-mozilla",
-        "rev": "c72bae8641d4486b3bd7b556d577df519f640f9a",
-        "sha256": "0yjls0866pd02dxkak558k24b19ljjcizy4r7dpjnsmafn25kx0a",
+        "rev": "1ca9ee7192f973fd67b0988bdd77b8c11ae245a6",
+        "sha256": "0f6x1lxi6ks5404ggnlmnj6d91834qya2hb4fbkfcxiids2wq17d",
         "type": "tarball",
-        "url": "https://github.com/mozilla/nixpkgs-mozilla/archive/c72bae8641d4486b3bd7b556d577df519f640f9a.tar.gz",
+        "url": "https://github.com/mozilla/nixpkgs-mozilla/archive/1ca9ee7192f973fd67b0988bdd77b8c11ae245a6.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "ocaml-vlq": {