README: improve make install example.
README: improve make install example.

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extra : convert_revision : xtraeme%40gmail.com-20091228223516-o6qxke64iahpime1

datenwolf/xbps,datenwolf/xbps,datenwolf/xbps,stpx/xbps,ebfe/xbps,stpx/xbps,ebfe/xbps,ebfe/xbps,stpx/xbps