3.2.1

Enhancements:

• Improve "BUILD" environment variable value (especially on powerpc) #2615
• Implement CentOS 7 ppc64le distro for conda skeleton rpm #2615
• Improve handling of outputs that use the build/skip key to skip building #2616

Bug fixes:

• Don't loop in all zipped keys when collecting used vars. Leave it to consumers to decide what to do. #2612
• Fix run_exports using pin_subpackage not applying versioning for the implicit top-level output #2613
• Fix run_exports not applying to build-time environment creation for top-level recipe (as opposed to outputs) #2613
• Fix CRAN skeleton to better use host/build envs appropriately #2614
• fix outputs not loading hash input info from files at test time correctly, leading to incorrect hashes and unresolved packages. #2616

Contributors:

• @mingwandroid
• @msarahan