The fall 2017 kernel will have 4.12 as the reference kernel, so
we update the libc-headers to match.
Build tested against glibc and muslc systems.
(From OE-Core rev: 4b5cce1c691e991c80d255a4900220068ff6f062)
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
