This fixes some problems with the ranges given for flags.

Class WarmCallInfo limits its values to 1.0e10, but the flags used
to set it's fields (HotCallCountThreshold etc.) are limited by max_intx.
Using values over 1.0e10 causes assertions in the debug build.

OptoLoopAlignment must be a multiple of nop size, else it's not
possible to generate the instructions that go into the pad.
On x86 NOP size is 1, so it's no problem.
For SPARC, OptoLoopAlignmentConstraintFunc implements a
special case for bigger NOPs. This is also needed for s390
and ppc.