swift234

Revert "[performance-inliner] Up inline threshold to 225 so that we are at least as aggressive with inlining as LLVM is."

This reverts commit r17979. This causes a regression on Phonebook sort
due to it changing inlining characteristics which causes us to reference
certain functions from the stdlib dylib (which have asserts).

If Arnold's specialization code gets in I will recommit this.

Swift SVN r17986