kernel: 3.14.4 -> 3.14.5 (close #2831)

(cherry picked from commit 3a0b265af9195b01629a6962820f335d2a6fd629)
libav: update 0.8.11 -> .12, 9.12 -> .13, introduce 10.1

(cherry picked from commit 77abe5e4641701f1b7213575ba93cca1ac60d309)