[PATCH] misc: Turn sstk into a compat symbol

[Joseph Myers]

In general making something (in the user namespace, not necessarily in the 
case of a symbol starting _) into a compat symbol should get an entry in 
NEWS under "Deprecated and removed features, and other changes affecting 
compatibility:".  We've done this even for functions that could not 
actually work at runtime (e.g. the wrappers for various obsolete Linux 
kernel syscalls removed from the kernel before the oldest kernel version 
supported by glibc at the time of making the symbols into compat symbols).

-- 
Joseph S. Myers
joseph@codesourcery.com