Add nghttp2 v1.54.0 as a dependency

The new bmcweb http2 support[1] is using nghttp2.  Add it as a
dependency.

Given there will likely only be one user, add it as:
1. Static library only (so unused functions can be deleted at link time)
2. Only build the library (don't build examples or CLI applications).

[1] https://gerrit.openbmc.org/c/openbmc/bmcweb/+/40978

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I92d97be97a44f36693c97ba504037e73112a30c9
1 file changed