build(homebrew): fix service install on linux (#5223)

packaging/sunshine.rb

@@ -174,6 +174,7 @@ class Sunshine < Formula
       -DSUNSHINE_PUBLISHER_WEBSITE='https://app.lizardbyte.dev'
       -DSUNSHINE_PUBLISHER_ISSUE_URL='https://app.lizardbyte.dev/support'
     ]
+    args << "-DSUNSHINE_EXECUTABLE_PATH=#{opt_bin}/sunshine" if OS.linux?
     # Point cmake at the venv Python that has jinja2 installed (set up in setup_build_environment)
     args << "-DPython_EXECUTABLE=#{@glad_python}" if @glad_python
     args
@@ -281,7 +282,8 @@ class Sunshine < Formula
   end
 
   service do
-    run [opt_bin/"sunshine", "~/.config/sunshine/sunshine.conf"]
+    run [opt_bin/"sunshine", "~/.config/sunshine/sunshine.conf"] if OS.mac?
+    name linux: "app-@PROJECT_FQDN@" if OS.linux?
   end
 
   def post_install