umdnsd: Disable GCC Werror failure
umdnsd: Disable GCC Werror failure

This mis-aligned pointer should be fixed upstream but for now
just ignore it.

Error:
| error: converting a packed 'struct dns_question' pointer
| (alignment 1) to a 'uint16_t' {aka 'short unsigned int'}
| pointer (alignment 2) may result in an unaligned pointer
| value [-Werror=address-of-packed-member]
|   261 |  uint16_t *swap = (uint16_t *) q;
|       |  ^~~~~~~~
| In file included from ../umdnsd/git-r0/git/dns.c:37:
| cc1: all warnings being treated as errors

Signed-off-by: Matthew Stanger <ecb9b4dfe16019a426071b535f3933bce9396897@gmail.com>

kraj/meta-openwrt