stage4: Install 'git' instead of transitional package 'git-core'

Fixes RPi-Distro#11

Author: XECDesign

stage3/00-install-packages/00-packages

@@ -1,7 +1,8 @@
 gstreamer1.0-x gstreamer1.0-omx gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-alsa gstreamer1.0-libav
 xpdf gtk2-engines alsa-utils
 desktop-base
-git-core rpi-update
+git
+rpi-update
 omxplayer
 raspberrypi-artwork
 policykit-1