Add 'crypto/libecc/' from commit '736d663976d1768533badbf06581481d01fade4c'
git-subtree-dir: crypto/libecc
git-subtree-mainline: f59bb61e1eb4d1e4fc3c60cc14779d0668267cb2
git-subtree-split: 736d663976d1768533badbf06581481d01fade4c
(cherry picked from commit f0865ec9906d5a18fa2a3b61381f22ce16e606ad)