Added git a required manifest dependency when needed.

It is needed for packages that install pip packages via git.

platypush/backend/pushbullet/manifest.yaml

@@ -1,6 +1,12 @@
 manifest:
   events:
     platypush.message.event.pushbullet.PushbulletEvent: if a new push is received
+  apk:
+    - git
+  apt:
+    - git
+  pacman:
+    - git
   install:
     pip:
     - git+https://github.com/rbrcsk/pushbullet.py

platypush/plugins/bluetooth/manifest.yaml

@@ -15,12 +15,15 @@ manifest:
   install:
     apk:
       - py3-pydbus
+      - git
     apt:
       - libbluetooth-dev
       - python3-pydbus
+      - git
     pacman:
       - python-pydbus
       - python-bleak
+      - git
     pip:
       - bleak
       - bluetooth-numbers