perl is run as part of the configure process, so we should ensure that
it's available.
Should fix [YOCTO #5768].
(From OE-Core rev: ff7071418217c343276c22c7e1a053672f92639b)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>