Add boost-url to the base container

- Add boost-url package used by bmcweb. In the current state
  bmcweb is able to pass CI with boost-url subproject support.
  This commit removes the need for vendoring and also the clone
  operation for every bmcweb commit.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: I9d29ea2c35856d25519dcf3a9fe281529e25c104
1 file changed