Instead of including the whole libc++ library by linking it dynamically,
use the static version so that unused symbols can be stripped.
This allows reducing the APEX size by 1MB (3.7MB -> 2.7MB), as otherwise
libc++ is included twice for 32 and 64 bit variants.
Original change (project moved):
Ia66d795cf23d6f45997278300c103976433f7c5c
Bug: 171540887
Test: Device boots and has connectivity, size reduced
Merged-In: I3c2563d4ae4e3715d0c6270344ba8f7ef067872f
Change-Id: Ie1c5b2ea274238a226ad2d827148439fd5758bb5
4be92df27b