add vimrc config file as a dependency for the product

Change-Id: I6fa3ba2f54c137804c0be70c1bf4f64505c630b6
vim: add a medium CM build variant

CM profile is between SMALL and NORMAL (780K)
with syntax (colors) and utf8 (mbyte) support.

Change-Id: I8f1ce1956b4c204e6ecdc19525c78bae07a24aaa