Revert "Move libmpbase dependency to where it is used"

This reverts commit 288c2fe355b45e22f53995a955a98c9b9642b627.

Align internal/proprietary source tree to the public one, and keep the
setup here as it is.

Change-Id: Ice30a27829f9e67bbc3deff562abaf882c6bc62e
1 file changed