net-misc/networkmanager: Fixing kernel config check

net-misc/networkmanager: Fixing kernel config check

CONFIG_NF_NAT_IPV4 and CONFIG_NF_NAT_IPV6 were merged into CONFIG_NF_NAT on:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3bf195ae6037e310d693ff3313401cfaf1261b71

CONFIG_NF_NAT_MASQUERADE_IPV4 and CONFIG_NF_NAT_MASQUERADE_IPV6 were merged into CONFIG_NF_NAT_MASQUERADE on:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1aca8ab3104aa7131f5ab144c6f586b54df084b

Closes: https://bugs.gentoo.org/691140
Closes: https://github.com/gentoo/gentoo/pull/12559
Signed-off-by: Rodrigo Saboya <saboya@gmail.com>
Signed-off-by: Matt Turner <mattst88@gentoo.org>