elfutils: Disable stringop-overflow warning for build host

elfutils: Disable stringop-overflow warning for build host

Some distributions shipping gcc12 end up with stringop-overflow warnings
e.g.
/usr/include/bits/unistd.h:74:10: error: ‘__pread_alias’ specified size between 9223372036854775813 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Werror=stringop-overflow=]
   74 |   return __glibc_fortify (pread, __nbytes, sizeof (char),
      |          ^~~~~~~~~~~~~~~

Until fixed, lets not treat this warning as hard error

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>