This change add's optimization remark in LoopVersioning LICM pass.

Summary:
This patch is adding remark messages to the LoopVersioning LICM pass, 
which will be useful for optimization remark emitter (ORE) infrastructure.

Patch by: Deepak Porwal

Reviewers: anemet, ashutosh.nema, eastig

Subscribers: eastig, vivekvpandya, fhahn, llvm-commits
llvm-svn: 323183