Use .service.exe extension for service binaries on Windows

services/service_manager/public/cpp/service.gni

Index: services/service_manager/public/cpp/service.gni
diff --git a/services/service_manager/public/cpp/service.gni b/services/service_manager/public/cpp/service.gni
index 04be44ed52984106fa805e151d3ac1162e57fe0a..5846b1375740b8471b6c3950f8f50188a21632f2 100644
--- a/services/service_manager/public/cpp/service.gni
+++ b/services/service_manager/public/cpp/service.gni
@@ -53,12 +53,18 @@ template("service") {
     service_data_deps += invoker.data_deps
   }
 
+  if (is_win) {
+    executable_extension = "service.exe"
+  } else {
+    executable_extension = "service"
+  }
+
   executable_target_name = base_target_name + "_executable"
-  executable_name = base_target_name + ".service"
+  executable_name = base_target_name + "." + executable_extension
 
   executable(executable_target_name) {
     output_name = base_target_name
-    output_extension = "service"
+    output_extension = executable_extension
 
     if (defined(invoker.cflags)) {
       cflags = invoker.cflags