jenkins: run git pre-commit hook for pep8, pyflakes, etc

This provides a central script for running certain checks at commit time,
and in jenkins automated builds.

jenkins-build

@@ -71,8 +71,8 @@ fdroid=$WORKSPACE/env/bin/fdroid $WORKSPACE/tests/run-tests ~jenkins/
 
 
 #------------------------------------------------------------------------------#
-# run pyflakes
-pyflakes fdroid makebuildserver fdroidserver/*.py setup.py
+# run git pre-commit hook for pep8, pyflakes, etc
+sh hooks/pre-commit
 
 
 #------------------------------------------------------------------------------#