Use .rc.1 instead

CHANGELOG.md

 Omnibus Ruby CHANGELOG
 ======================
-v3.2.0.rc (July 14, 2014)
--------------------------
+v3.2.0.rc.1 (July 14, 2014)
+-----------==--------------
 - Make build commands output during `log.info` instead of `log.debug`
 - Refactor Chef Sugar into an includable module, permitting DSL methods in both Software and Project definitions
 - Refactor `omnibus release` into a non-S3-specific backend "publisher"

lib/omnibus/version.rb

@@ -15,5 +15,5 @@
 #
 module Omnibus
-  VERSION = '3.2.0.rc'
+  VERSION = '3.2.0.rc.1'
 end