libbpf-tools: update vmlinux.h with BPF helper flags generated from UAPI

Update vmlinux.h to a version generated from same v5.5 tag and default config
with cherry-picked 1aae4bdd7879 ("bpf: Switch BPF UAPI #define constants used
from BPF program side to enums") on top of it. This adds lots of BPF helper
flags often useful from BPF program side.

Signed-off-by: Andrii Nakryiko <[email protected]>