Fix the failing windows builder by adding a .exe suffix

Also rerun `python3 infra/recipes.py test train`, as I forgot to do so
last time.

Bug: None
Change-Id: I4673cd468f7eb3e57ed3d454d9100c756a6a6964
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/23320
Reviewed-by: Takuto Ikuta <tikuta@google.com>

infra/recipes/gn.expected/ci_win.json

diff --git a/infra/recipes/gn.expected/ci_win.json b/infra/recipes/gn.expected/ci_win.json
index 0e2149a..0f549e4 100644
--- a/infra/recipes/gn.expected/ci_win.json
+++ b/infra/recipes/gn.expected/ci_win.json
@@ -280,8 +280,8 @@
       "[START_DIR]\\cipd\\ninja",
       "-C",
       "[START_DIR]\\gn\\out",
-      "gn",
-      "gn_unittests"
+      "gn.exe",
+      "gn_unittests.exe"
     ],
     "cwd": "[START_DIR]\\gn",
     "env": {
@@ -389,8 +389,8 @@
       "[START_DIR]\\cipd\\ninja",
       "-C",
       "[START_DIR]\\gn\\out",
-      "gn",
-      "gn_unittests"
+      "gn.exe",
+      "gn_unittests.exe"
     ],
     "cwd": "[START_DIR]\\gn",
     "env": {

infra/recipes/gn.expected/cq_win.json

diff --git a/infra/recipes/gn.expected/cq_win.json b/infra/recipes/gn.expected/cq_win.json
index ed9cf24..17c6df3 100644
--- a/infra/recipes/gn.expected/cq_win.json
+++ b/infra/recipes/gn.expected/cq_win.json
@@ -331,8 +331,8 @@
       "[START_DIR]\\cipd\\ninja",
       "-C",
       "[START_DIR]\\gn\\out",
-      "gn",
-      "gn_unittests"
+      "gn.exe",
+      "gn_unittests.exe"
     ],
     "cwd": "[START_DIR]\\gn",
     "env": {
@@ -440,8 +440,8 @@
       "[START_DIR]\\cipd\\ninja",
       "-C",
       "[START_DIR]\\gn\\out",
-      "gn",
-      "gn_unittests"
+      "gn.exe",
+      "gn_unittests.exe"
     ],
     "cwd": "[START_DIR]\\gn",
     "env": {

infra/recipes/gn.py

diff --git a/infra/recipes/gn.py b/infra/recipes/gn.py
index 443ce2a..535ca4f 100644
--- a/infra/recipes/gn.py
+++ b/infra/recipes/gn.py
@@ -264,7 +264,11 @@
 
             # Windows requires the environment modifications when building too.
             ninja_cmd = [cipd_dir.join('ninja'), '-C', src_dir.join('out')]
-            api.step('build', ninja_cmd + ['gn', 'gn_unittests'])
+            exe_suffix = '.exe' if target.is_win else ''
+            api.step('build', ninja_cmd + [
+              f'gn{exe_suffix}',
+              f'gn_unittests{exe_suffix}',
+            ])
 
             if target.is_host:
               api.step('test', [src_dir.join('out', 'gn_unittests')])