Add shell utils required by xbps-src.
These files are moved from the GIT repository. --HG-- extra : convert_revision : xtraeme%40gmail.com-20090818153742-98s9y92f5m19l3c2
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These files are moved from the GIT repository. --HG-- extra : convert_revision : xtraeme%40gmail.com-20090818153742-98s9y92f5m19l3c2