Revert "lets try -Ofast instead of O3"

This reverts commit adf7e433b4a2ae9ffc77dcd0fa4631fdfe038935.
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Conflicts:

	include/linux/migrate.h
3.0.39

Conflicts:

	include/linux/migrate.h
3.0.40
3.0.41
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Linux 3.0.44
Linux 3.0.45
Linux 3.0.46
Linux 3.0.47
Linux 3.0.48
Linux 3.0.49