mongodb: libc++, boost, --full support.

 * On 10.9, use libc++ (not libstdc++) for devel and HEAD builds
 * Pass --full flag to install headers and library also.
 * Add option --with-boost, to pass --use-system-boost to scons (avoid linking issues with the created library).

Closes #25253.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
mongodb: update 2.4.9 bottle.