Revert r229622: "[LoopAccesses] Make VectorizerParams global" and others....

Revert r229622: "[LoopAccesses] Make VectorizerParams global" and others. r229622 brought cyclic dependencies between Analysis and Vector.

  r229622: "[LoopAccesses] Make VectorizerParams global"
  r229623: "[LoopAccesses] Stash the report from the analysis rather than emitting it"
  r229624: "[LoopAccesses] Cache the result of canVectorizeMemory"
  r229626: "[LoopAccesses] Create the analysis pass"
  r229628: "[LoopAccesses] Change debug messages from LV to LAA"
  r229630: "[LoopAccesses] Add canAnalyzeLoop"
  r229631: "[LoopAccesses] Add missing const to APIs in VectorizationReport"
  r229632: "[LoopAccesses] Split out LoopAccessReport from VectorizerReport"
  r229633: "[LoopAccesses] Add -analyze support"
  r229634: "[LoopAccesses] Change LAA:getInfo to return a constant reference"
  r229638: "Analysis: fix buildbots"

llvm-svn: 229650