package/go: security bump to 1.16.14
go1.16.14 includes security fixes to the crypto/elliptic, math/big packages
and to the go command, as well as bug fixes to the compiler, linker,
runtime, the go command, and the debug/macho, debug/pe, net/http/httptest,
and testing packages.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>