I've added more licenses from SPDX and corrected the gcc license
so that it is a. parsable and b. accurate to the SPDX standard.
I've also done some cleanup of license text and gdb's LICENSE
field.
(From OE-Core rev: e47343d12ee571281238bbf5663b074c0e32049f)
Signed-off-by: Beth Flanagan <elizabeth.flanagan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
