lint-staged: support templates in a sub folder

like slaprunner and some others are using, sometimes templates are in
a templates subdirectory and paths in buildout.hash are relatives to
that.

package.json

@@ -10,7 +10,9 @@
     ],
     "{components,software,stack}/**": [
       "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"python2\", \"./update-hash\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'",
-      "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"git\", \"add\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'"
+      "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"python2\", \"./update-hash\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"..\", \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'",
+      "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"git\", \"add\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'",
+      "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"git\", \"add\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"..\", \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'"
     ]
   },
   "husky": {