2022-02-26 00:15 UTC+0800 ~ Yuntao Wang [off-list ref]

Since the _OUTPUT variable holds a value ending with a trailing slash,
there is no need to add another one when defining BOOTSTRAP_OUTPUT and
LIBBPF_OUTPUT variables.

When defining LIBBPF_INCLUDE and LIBBPF_BOOTSTRAP_INCLUDE, we shouldn't
add an extra slash either for the same reason.

When building libbpf, the value of the DESTDIR argument should also not
end with a trailing slash.

Signed-off-by: Yuntao Wang <redacted>

Looks correct to me, thanks!

Reviewed-by: Quentin Monnet <redacted>