gitignore: Ignore libraries regardless of directory
gitignore: Ignore libraries regardless of directory

Currently our gitignore works becuase all of our libraries reside in the
the top level directory and are named /lib*. We should really just be
ignoring any file *.a *.so* or *.la.

Change-Id: I6b48dc34819ac1798bbee5796dbe220c93db876e
Signed-off-by: William A. Kennington III <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid