Instead of using the internal copy of libpcre, use one that we build. Note that
this requires libpcre enables Unicode properties.
(From OE-Core rev: 365f4092070b2e7978b8db65298308f4e770a501)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>