Make blink_trybot recipe work on windows

scripts/slave/recipes/run_presubmit.expected/tools_build.json

 [
   {
-   "cmd": ["[DEPOT_TOOLS_ROOT]/gclient", "config", "--spec", "deps_os = {}\nhooks = []\nsolutions = [{'custom_deps': {}, 'custom_vars': {}, 'deps_file': '.DEPS.git', 'managed': True, 'name': 'build', 'safesync_url': None, 'url': 'https://chromium.googlesource.com/chromium/tools/build.git'}]\ntarget_os = []\ntarget_os_only = False"],
+   "cmd": ["python", "-u", "[DEPOT_TOOLS_ROOT]/gclient.py", "config", "--spec", "deps_os = {}\nhooks = []\nsolutions = [{'custom_deps': {}, 'custom_vars': {}, 'deps_file': '.DEPS.git', 'managed': True, 'name': 'build', 'safesync_url': None, 'url': 'https://chromium.googlesource.com/chromium/tools/build.git'}]\ntarget_os = []\ntarget_os_only = False"],
    "name": "gclient setup",
    "seed_steps": ["gclient setup", "gclient sync"]
   },
   {
-   "cmd": ["[DEPOT_TOOLS_ROOT]/gclient", "sync", "--verbose", "--with_branch_heads", "--nohooks", "--reset", "--delete_unversioned_trees", "--force"],
+   "cmd": ["python", "-u", "[DEPOT_TOOLS_ROOT]/gclient.py", "sync", "--verbose", "--with_branch_heads", "--nohooks", "--reset", "--delete_unversioned_trees", "--force"],
    "name": "gclient sync"
   },
   {
    "cmd": ["git", "config", "user.email", "commit-bot@chromium.org"],
    "cwd": "[SLAVE_BUILD_ROOT]/build",
    "name": "git config user.email",
    "seed_steps": ["git config user.email", "git config user.name", "git clean"]
   },
   {
    "cmd": ["git", "config", "user.name", "The Commit Bot"],
    "cwd": "[SLAVE_BUILD_ROOT]/build",
    "name": "git config user.name"
   },
   {
    "cmd": ["git", "clean", "-xfq"],
    "cwd": "[SLAVE_BUILD_ROOT]/build",
    "name": "git clean"
   },
   {
-   "cmd": ["[DEPOT_TOOLS_ROOT]/apply_issue", "-r", "[SLAVE_BUILD_ROOT]/build/", "-i", 12853011, "-p", 1, "-s", "https://chromiumcodereview.appspot.com", "-e", "commit-bot@chromium.org"],
+   "cmd": ["python", "-u", "[DEPOT_TOOLS_ROOT]/apply_issue.py", "-r", "[SLAVE_BUILD_ROOT]/build/", "-i", 12853011, "-p", 1, "-s", "https://chromiumcodereview.appspot.com", "-e", "commit-bot@chromium.org", "--no-commit"],
    "name": "apply_issue"
   },
   {
    "cmd": ["[DEPOT_TOOLS_ROOT]/presubmit_support.py", "--root", "[SLAVE_BUILD_ROOT]/build/", "--commit", "--verbose", "--verbose", "--issue", 12853011, "--patchset", 1, "--skip_canned", "CheckRietveldTryJobExecution", "--skip_canned", "CheckTreeIsOpen", "--skip_canned", "CheckBuildbotPendingBuilds", "--rietveld_url", "https://chromiumcodereview.appspot.com", "--rietveld_email", "", "--rietveld_fetch"],
    "name": "presubmit"
   }
 ]