Update repo to do ch-sync from Git

Change-Id: Id636ee50462a0874bdbf88c9b2fa545c9c71f51e

Makefile

@@ -14,8 +14,8 @@ functional_test:
 
 bin/charm_helpers_sync.py:
 	@mkdir -p bin
-	@bzr cat lp:charm-helpers/tools/charm_helpers_sync/charm_helpers_sync.py \
-        > bin/charm_helpers_sync.py
+	@curl -o bin/charm_helpers_sync.py https://raw.githubusercontent.com/juju/charm-helpers/master/tools/charm_helpers_sync/charm_helpers_sync.py
+
 
 sync: bin/charm_helpers_sync.py
 	@$(PYTHON) bin/charm_helpers_sync.py -c charm-helpers-hooks.yaml

charm-helpers-hooks.yaml

@@ -1,4 +1,4 @@
-branch: lp:charm-helpers
+repo: https://github.com/juju/charm-helpers
 destination: hooks/charmhelpers
 include:
     - core

charm-helpers-tests.yaml

@@ -1,4 +1,4 @@
-branch: lp:charm-helpers
+repo: https://github.com/juju/charm-helpers
 destination: tests/charmhelpers
 include:
     - contrib.amulet