Use 'gyp' dir in update_canary_angle.py.

The old 'build' dir was copying stale DLLs.

BUG=angleproject:1569

Change-Id: Ib11fb9f1e1e480fe32af3f291357e0fb92429318
Reviewed-on: https://chromium-review.googlesource.com/411389
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

scripts/update_canary_angle.py

@@ -15,10 +15,10 @@ import sys, os, shutil
 
 # Set of search paths.
 source_paths = [
-    os.path.join('..', 'build', 'Debug_x64'),
-    os.path.join('..', 'build', 'Debug_Win32'),
-    os.path.join('..', 'build', 'Release_x64'),
-    os.path.join('..', 'build', 'Release_Win32'),
+    os.path.join('..', 'gyp', 'Debug_x64'),
+    os.path.join('..', 'gyp', 'Debug_Win32'),
+    os.path.join('..', 'gyp', 'Release_x64'),
+    os.path.join('..', 'gyp', 'Release_Win32'),
     os.path.join('..', 'out', 'Debug'),
     os.path.join('..', 'out', 'Debug_x64'),
     os.path.join('..', 'out', 'Release'),