[PATCH] Clean up early inliner

[Jan Hubicka]

Hi,
for some reason the patch seems to regress compile time for flatten tramp3d
tester as well as runtime.  I think runtime is caused by fact that overall size
for small inlining should be based on the unit size after flattening (so
flattening won't blow up all unit growth limits.).  

This has chance to fix the compile time issues too, if we get lucky.
I will test patch after testers pick up my yesterday inliner fix.

Honza