base.bbclass: fix substring matching in COMMERCIAL_LICENSE
Previously, if for example you had a package called "mx", and a second
package called "libomxil" listed in COMMERCIAL_LICENSE (without mx being
listed there), it would match mx as being commercially licensed because
mx is a substring of libomxil. Fix the search to ensure it only matches
the listed package name exactly.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
