rust: apply patch to fix duplicate object file bug

Having multiple object files with the same name upsets libtool and
breaks the librsvg build. See Homebrew#85278.

Formula/rust.rb

@@ -2,6 +2,7 @@ class Rust < Formula
   desc "Safe, concurrent, practical language"
   homepage "https://www.rust-lang.org/"
   license any_of: ["Apache-2.0", "MIT"]
+  revision 1
 
   stable do
     url "https://static.rust-lang.org/dist/rustc-1.56.1-src.tar.gz"
@@ -61,6 +62,14 @@ class Rust < Formula
     end
   end
 
+  # Make sure object files in static archives have distinct names.
+  # https://github.com/rust-lang/compiler-builtins/issues/443
+  patch do
+    url "https://github.com/rust-lang/compiler-builtins/commit/eaab9d29ecbf538369d7f26953425eb78dae8229.patch?full_index=1"
+    sha256 "2eaafddf3dad416431b42f3a5e222a2d4261ab026a165c7f23d6ec378a0ccff5"
+    directory "vendor/compiler_builtins"
+  end
+
   def install
     ENV.prepend_path "PATH", Formula["[email protected]"].opt_libexec/"bin"