[depot_tools] fix args to pass --depth

The current code appends "--depth 1" as a single parameter.

Change-Id: I87cf34ffc45d0d9ce49453a7449b82e526989924
Recipe-Nontrivial-Roll: infra
Recipe-Nontrivial-Roll: build
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5105224
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>

recipes/recipe_modules/git/api.py

@@ -262,7 +262,7 @@ class GitApi(recipe_api.RecipeApi):
 
       if depth:
         assert isinstance(depth, int)
-        fetch_args.append('--depth %d' % depth)
+        fetch_args += ['--depth', depth]
 
       fetch_step_name = 'git fetch%s' % step_suffix
       if display_fetch_size:

recipes/recipe_modules/git/examples/full.expected/git-checkout-with-depth.json

@@ -19,7 +19,8 @@
       "main",
       "--recurse-submodules",
       "--progress",
-      "--depth 1"
+      "--depth",
+      "1"
     ],
     "cwd": "[START_DIR]/src",
     "env": {