Make deps as well

[stringsn88keys]

sha3 needed to make hex dependencies from the referenced git repo.

Otherwise, was getting this symptom:

~projects/sha3 git:(master)  make                                                                                      [1.58] 16:12:15
./rebar -v compile
WARN:  Expected /Users/tpowell/projects/sha3/deps/hex to be an app dir (containing ebin/*.app), but no .app found.
==> sha3 (compile)
WARN:  Expected /Users/tpowell/projects/sha3/deps/hex to be an app dir (containing ebin/*.app), but no .app found.
Dependency not available: hex-.* ({git,"git://github.com/b/hex","HEAD"})
ERROR: compile failed while processing /Users/tpowell/projects/sha3: rebar_abort