librt: convince spawn to compile for !LFS
librt: convince spawn to compile for !LFS

Great to have this valuable family of high kwalitee functions in here.

Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc