make bpf_syscall_wrappers visible to libclat

Needed because ClatdController and clatd binary are moved
into apex. libclat is used for accessing BPF map.

Bug: 212345928
Test: manual test
    1. Connect to ipv6-only wifi.
    2. Try IPv4 traffic.
       $ ping 8.8.8.8
Change-Id: I95a1c21927ba95f6094152e1013761d79c73e981
1 file changed
tree: e05907d0b99fd903c833003a91b059cfcc684a99
  1. staticlibs/