[LOCAL, backport]: Backport from mainline to fix warning message

Warning message:
newlib-custom/newlib/libc/search/hash.c:240:11: warning: assignment
from incompatible pointer type [enabled by default]

Reported and fixed upstream:
https://sourceware.org/ml/newlib/2014/msg00005.html

2014-01-06  Mike Frysinger  <vapier@gentoo.org>

        * libc/search/hash.c (hash_delete): Change __uint32_t to u_int.
        (hash_get): Likewise.
        (hash_put): Likewise.
        (hash_seq): Likewise.
        (hash_sync): Likewise.

Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>