[PATCH] Add UNSUPPORTED check in elf/tst-pldd.

[Joseph Myers]

This has broken the build for i686-gnu.

In file included from support_ptrace.c:22:
../include/sys/prctl.h:2:15: fatal error: sys/prctl.h: No such file or directory
 #include_next <sys/prctl.h>
               ^~~~~~~~~~~~~

-- 
Joseph S. Myers
joseph@codesourcery.com