[opus] [Patch] Check if opus_compare is executable in run_vectors.sh

[Aurélien Zanelli]

If opus_compare doesn't exist or isn't executable, tests failed normally
which could be misleading.
So test for existence and mode to avoid this ambiguity.
-- 
Aurélien Zanelli
Parrot SA
174, quai de Jemmapes
75010 Paris
France
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-Check-if-opus_compare-is-executable-in-run_vectors.s.patch
Type: text/x-patch
Size: 0 bytes
Desc: not available
Url : http://lists.xiph.org/pipermail/opus/attachments/20130527/3177ffc6/attachment.bin