diffutils/run-ptest: support to run at arbitrary path
1. Run run-ptest at arbitrary path
2. Fix large-subopt.in1 not found
...
|diff: /lib32-diffutils/3.7-r0/build/../diffutils-3.7/tests/large-subopt.in1:
No such file or directory
|diff: /lib32-diffutils/3.7-r0/build/../diffutils-3.7/tests/large-subopt.in2:
No such file or directory
...
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
