InlineSmallCode is too low by default

[Rémi Forax]

InlineSmallCode is set to 1000 on x86 by default if tiered mode
is not enabled and 2000 if tiered mode is enabled.

I wonder if there is a reason for that inconsistency.

InlineSmallCode is the threshold used by the inlining heuristic
to know if a method is too big or not to be inlined multiple times,
on my dynamic language runtime, setting it to 2000 is very important
because otherwise most of the high order functions (function that
takes a function as argument) are not compiled with their callsite
so escape analysis can't work.

I suppose it's also the case for users that use libraries like
Google guava or Goldman Sachs's gs-collection that exhibit the same 
patterns.

that why I propose to bump InlineSmallCode to 2000 for x86 and
2500 for sparc by default (the defaults in tiered mode).

Rémi