Tcpdump has a fairly small footprint and should be installed to all
images (it currently is on the ubuntu image by default). Sometimes the
reason you need it is also the reason its to late to get it.
Change-Id: I4849157515b389d534bdee755cdac6b0768fcb29
Create an install hook where core utilities can be installed
on Fedora. In this case we are installing which.
Which is being used by
ramdisk/post-install.d/01-ensure-binaries
vm/finalise.d/51-grub
The absence to which caused the ramdisk build to fail on F19.
On Ubuntu which is installed with the package debianutils, this pretty
much has to exist on Ubuntu images, so a corresponding package install for
ubuntu isn't needed.
Fixes Bug 1202612
Change-Id: I847c1619cdab021c9348caed3fa32db64e663e8e
