Package and run benchmark as part of ptest
This is a major release with following changes [1]
[1] https://github.com/libexpat/libexpat/blob/R_2_6_0/expat/Changes
(From OE-Core rev: 0f5a64aecec9d50b50e2ca70bb1a7e4b680bc4ce)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>