netifd: update to latest git HEAD (FS#1668)

netifd: update to latest git HEAD (FS#1668)

75ee790 interface-ip: fix eui64 ifaceid generation (FS#1668)
ca97097 netifd: make sure the vlan ifname fits into the buffer
b8c1bca iprule: remove bogus assert calls
a2f952d iprule: fix broken in_dev/out_dev checks
263631a vlan: use alloca to get rid of IFNAMSIZE in vlan_dev_set_name()
291ccbb ubus: display correct prefix size for IPv6 prefix address
908a9f4 CMakeLists.txt: add -Wimplicit-fallthrough to the compiler flags
b06b011 proto-shell.c: add a explicit "fall through" comment to make the compiler happy
60293a7 replace fall throughs in switch/cases where possible with simple code changes

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>