The symbol name of a static const variable defined within a function
includes a '.' and old kernel BTF ferifier rejects it.
"""
08-29 15:11:27.825 0 0 W : c3 1287 NetBpfLoad: [377] STRUCT _rodata size=64 vlen=3
08-29 15:11:27.825 0 0 W : c3 1287 NetBpfLoad: tcp_option type_id=343 bits_offset=0
08-29 15:11:27.825 0 0 W : c3 1287 NetBpfLoad: schedcls_ingress_accecn_eth_.new_cnt type_id=346 bits_offset=128 Invalid name
"""
This verifier limitation was relaxed in later kernels by
https://lore.kernel.org/bpf/20230615145607.3469985-1-revest@chromium.org/
Test: Boot on 4.19 kernel && logcat
Bug: 440448408
Bug: 442710894
Flag: EXEMPT tcpAccECN program is not used
Change-Id: If3c993bb6abb1ff8688932d682d909d335f84ca2
937c57a2f8