dtc: Count testcases and results in the dtc/libfdt testsuite

[Jon Loeliger]

So, like, the other day David Gibson mumbled:
> There are quite a lot of testcases in the dtc testsuite (recently
> imported from libfdt).  It can be easy to miss a stray FAIL result in
> the midst of all the rest.  To improve this, this patch adds a summary
> to the end of the testsuite results giving the total number of tests
> along with the number of PASSes FAILs and other results.
> 
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

Applied.

Thanks,
jdl