[PATCH] Support outline instrumentation for wide types

[Kostya Serebryany]

  The code looks fine, please just add a test to llvm/test/Instrumentation/AddressSanitizer/instrumentation-with-call-threshold.ll
  I actually considered to always emit calls for non 1-, 2-, 4-, -8, and 16-byte accesses to simplify the code and testing.
  This will slowdown this use case somewhat, but those accesses are extremely rare anyway.
  What do others think?

http://reviews.llvm.org/D3447