Remove the workaround which identified Go executables, and permitted them

Remove the workaround which identified Go executables, and permitted them
to do syscalls directly.  Go executables now use shared libc like all other
dynamic binaries.  This makes the "where are syscalls done from" checker
strict for all binaries, and also opens the door to change the underlying
syscall ABI to the kernel in the future very easily (if we find cause).
ok jsing