Switch ceres from stlport to libc++
Switch ceres from stlport to libc++

Change-Id: I02c6604c461a1669b40b29b1efaa751ad576729c

geekboxzone/mmallow_external_ceres-solver,android-ia/platform_external_ceres-solver,geekboxzone/lollipop_external_ceres-solver,android-ia/platform_external_ceres-solver,geekboxzone/mmallow_external_ceres-solver,geekboxzone/lollipop_external_ceres-solver,android-ia/platform_external_ceres-solver,android-ia/platform_external_ceres-solver,geekboxzone/lollipop_external_ceres-solver,geekboxzone/mmallow_external_ceres-solver,geekboxzone/lollipop_external_ceres-solver,geekboxzone/mmallow_external_ceres-solver