Fix Tools/Scripts/check-blink-deps

Chromium's checkdeps.py has moved but the
script was never updated.

TEST=Manually run the script and it works!

Review URL: https://codereview.chromium.org/325473003

git-svn-id: svn://svn.chromium.org/blink/trunk@175733 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Tools/Scripts/check-blink-deps

@@ -46,7 +46,7 @@ def main():
     if not start_dir:
         start_dir = os.path.join(root_dir, 'Source')
 
-    check_deps = os.path.realpath(os.path.join(root_dir, os.pardir, os.pardir, 'tools', 'checkdeps', 'checkdeps.py'))
+    check_deps = os.path.realpath(os.path.join(root_dir, os.pardir, os.pardir, 'buildtools', 'checkdeps', 'checkdeps.py'))
     subprocess.call([sys.executable, check_deps, '--root', root_dir, start_dir])
 
 if '__main__' == __name__: