apps: update

Signed-off-by: Avi Kivity <avi@cloudius-systems.com>
core: add ppoll() C linkage
libc: add pthread_attr_setinheritsched to run WEBrick its ruby HTTP server
libc: display what library load to debug
Remove double include
libc: add getifaddrs to run name resolver API for ruby
libc: add freeifaddrs() to name resolver API for ruby
libc: add finite(), finitef(), finitel()