[MLIR][NFC] rename ConvertStandardToLLVM, ConvertLoopToStandard to drop Convert prefix

[bondhugula]

Summary

This is in line with the convention agreed on https://llvm.discourse.group/t/rfc-canonical-file-paths-to-dialects/621

Signed-off-by: Uday Bondhugula <[e-mail]>

mlir/lib/Conversion/LoopToStandard/CMakeLists.txt

 add_mlir_conversion_library(MLIRLoopToStandard
-  ConvertLoopToStandard.cpp
+  LoopToStandard.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${MLIR_MAIN_INCLUDE_DIR}/mlir/Conversion/LoopToStandard
 )
 target_link_libraries(
   MLIRLoopToStandard
   PUBLIC
   MLIRLoopOps
   MLIRTransforms
   LLVMCore
   LLVMSupport
   )

mlir/lib/Conversion/LoopToStandard/LoopToStandard.cpp

-//===- ConvertLoopToStandard.cpp - ControlFlow to CFG conversion ----------===//
+//===- LoopToStandard.cpp - ControlFlow to CFG conversion -----------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements a pass to convert loop.for, loop.if and loop.terminator

mlir/lib/Conversion/StandardToLLVM/CMakeLists.txt

 add_mlir_conversion_library(MLIRStandardToLLVM
-  ConvertStandardToLLVM.cpp
+  StandardToLLVM.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${MLIR_MAIN_INCLUDE_DIR}/mlir/Conversion/StandardToLLVM
 )
 target_link_libraries(
   MLIRStandardToLLVM
   PUBLIC
   MLIRLLVMIR
   MLIRTransforms
   LLVMCore
   LLVMSupport
   )

mlir/lib/Conversion/StandardToLLVM/StandardToLLVM.cpp

-//===- ConvertStandardToLLVM.cpp - Standard to LLVM dialect conversion-----===//
+//===- StandardToLLVM.cpp - Standard to LLVM dialect conversion -----------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements a pass to convert MLIR standard and builtin dialects