Some of the titles in LICENSE.rst and baremetal.rst
had extra underline characters.  These should match
the length of the line above.

Very minor and low priorty changes, but we should fix
any of the warnings that we can.

Change-Id: Idaa7c8272ef034b5000360c7720d99a89357d0b6
Signed-off-by: randyl <r.levensalor@cablelabs.com>