When TARGET_PREFIX and TARGET_SYS didn't match up, the symlinks we made
were invalid. TARGET_PREFIX is what we use when configuring so it's what we
should be using here.
This is 05143e9b5d0a42e32ee0dd3c7fde482ff8d63f63 from OE.
(From OE-Core rev: c0d6ba1ead3e68509718bea09d0b4d5a49a5f73e)
Signed-off-by: Tom Rini <tom_rini@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>