[klibc] Install headers with consistent mode

Currently we ensure the installed headers are readable by everyone,
but write permissions will depend on the current umask.  Turn off the
group and other writable bits to ensure consistent results.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
1 file changed