Adding finddeps tool.

Firstly, the current build does not compile. Fixing that, and changing all .cc and .h files to 0644.

Also, adding a finddeps tool. Currently it is extremely slow (has been running for over 1/2 hour for LBShell). Possible improvements could be to make it a BFS instead of a DFS (that way it won't go into the webkit myriad too deep), parallelize the search over multiple CPU, and possibly add more command line parameters (like max_results and depth search configuration).