Some host distributions (opensuse for example) are using 'pkgconf',
which, unlike the original pkg-config, appends PKG_CONFIG_SYSROOT_DIR
to every directory from the .pc file.
Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>