Always cache the platform/target as uppercase, and always return platform and target as uppercase (regression for bug 10674). Fixes problems with building and displaying emulator, as well as discovering GCCE prefix file correctly.

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>

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 $Id: plugin.xml,v 1.1 2009/02/05 00:31:08 wpaul Exp $
-->

<plugin>
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