[arch-dev-public] [signoff] mpfr-3.0.0-1, gcc-4.5.0-6 and libmpc-0.8.2-2

mpfr-3.0.0-1: upstream update, passes entire testsuite. gcc-4.5.0-6: update to 20100610 snapshot, patch to fix khtml/chromium issues (please test). libmpc-0.8.2-2: mpfr rebuild only