opkg-ptest: fixup run-ptest
opkg-ptest: fixup run-ptest

:**/opkg-ptest/files/run-ptest
* Use 'find' instead of 'ls' to locate ptests. 'ls' will throw an error
if it cannot find tests; which is undesirable behavior for the
run-ptests script.

Signed-off-by: Alex Stewart <04cdb2793e4fb0120cc30d1c823099f3862701f4@ni.com>
Acked-by: Brad Mouring <58d99a887450796456131638ba4c43b5ba95afcf@ni.com>
Acked-by: Ken Sharp <e6c8ad8f54d15df4645e8aaf3f7a209bc3688570@ni.com>
Natinst-ReviewBoard-ID: 206641

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt