Version bump v3.2.0.rc

/cc @opscode/release-engineers 
This should be:

> Downgrade FPM to ~> 0.4 - FPM 1.0.0+ uses FFI to attach to some `libc` functions. This fails on RHEL 5 & 6. As we don’t need a bleeding edge FPM the easiest fix is to just downgrade to the most recent pre-1.0.0 version.