[CodeGen] Rename DEBUG_TYPE for default hazard recognizer.
[CodeGen] Rename DEBUG_TYPE for default hazard recognizer.

Summary:
The DEBUG_TYPE of the default hazard recognizer should be updated to
match the DEBUG_TYPE of the machine-scheduler pass.

Reviewers: rampitec

Reviewed By: rampitec

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61359

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@360198 91177308-0d34-0410-b5e6-96231b3b80d8

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