* sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c: Define
__libc_have_rt_sigs.
* sysdeps/sparc/sparc32/__longjmp.S: Define _SETJMP_H before
including <bits/setjmp.h>.
* sysdeps/sparc/sparc32/setjmp.S: Likewise.
Patch from the Debian glibc/SPARC package.