Fix build warning about annotated tags.

Currently, this error is issued 4 times at the start of a build:

fatal: No annotated tags can describe '0eb25c2a5e7441037265...
However, there were unannotated tags: try --tags.

This patch eliminates this non-lethal fatal error by adding --tags
to the git describe commands in the make files. This tag label is used
to set a CFLAGS version string for the driver.

Or, you can eliminate the error by putting in an annotated tag eg.:
git tag -a cm-10.2 -m 'eliminate error messages'
then, you don't need this patch. Or an annotated tag could be added to
the repo.

Change-Id: I388aff76df9d2e9b48da3693c89535133e7b1a35