modules: update OpenWrt packages

40da7ecf21ff socat: Fix CRDLY, TABDLY and CSIZE shifts for PowerPC
a5bbf27e3532 libxml2: add Debian patches to address CVEs
1e77dfa7b084 tiff: fix remaining CVEs
cad5ceed6a87 unbound: drop odhcpd leases with wrong field count
eb5ac25380e7 postgresql: security bump to 9.5.14
43f14b81120a unbound: limit outside script source to init funciton scope