Add a name for the regyp hook

Change-Id: Ia403b1fc379688de5cd7e68fa99c364c1df36c00
Reviewed-on: https://chromium-review.googlesource.com/728955Reviewed-by: Ben Smith <binji@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48764}

DEPS

@@ -307,6 +307,7 @@ hooks = [
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
+    'name': 'regyp_if_needed',
     'pattern': '.',
     'action': ['python', 'v8/gypfiles/gyp_v8', '--running-as-hook'],
   },