Revert "Revert "Revert "rework ext4: use atomic64_t for the per-flexbg free_clusters count"""

This reverts commit 6d80030412bcbdb1709328e4d84ff1a9ac5de190.
Revert "Revert " android/lowmemorykiller: Wait for memory to be freed""

This reverts commit cc4c90ad5f79ad04b31247f163234020c0f58086.
Merge remote-tracking branch 'origin/sunxi-3.0' into sunxi-3.0
vfp compile with NEON softfp optimizations
config updates