Update netpgpverify and libnetpgpverify to 20160707 to fix some
unusual build errors shown by old gcc versions (works fine for
gcc-5.2.1 on ubuntu and gcc-5.3.0 on NetBSD 7.99.32)

+ use ULL suffix on unsigned 64bit constants, not UL

+ don't typedef the public structs twice - second time just define it
without the typedef

Fixes PR pkg/51327

(agc)