insane.bbclass: use bb.process.Popen instead of subprocess.check_output
subprocess.check_output was only introduced in Python v2.7, so we
cannot use it. This refactors the QA test to use bb.process.Popen
instead.
This fixes the error:
AttributeError: 'module' object has no attribute 'check_output'
It no longer checks the return status of prelink-rtld, as that
case was simply adding noise. This QA test is intended to only
warn about specific paths that binaries could be linking to, not
handle the case where there is a missing library.
Signed-off-by: Scott Garman <scott.a.garman@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
