m7: update bt and wifi firmware from 2.17.401.1

Change-Id: Ibd471f79ade2ef566e09356c27b255a1597c1eea
m7-common: remove HTC diagnostic binaries

Change-Id: Ica59f8142f7af5b8b094e0856d13d66524aea899
m7: make proprietary file system dir implicit

Change-Id: Ib41e537c5baa7d05d0cbd75e3cade4d7c4a3836e