Hardcoded paths to perl don't make sense, use from the environment instead.
[Patch taken from meta-mentor by RP]
(From OE-Core rev: 8072f26f7304ff5367d5be357037644cb1f6241e)
Signed-off-by: Christopher Larson <kergoth@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>