[gn build] Port f5b5ccf

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/CodeGen/BUILD.gn

@@ -116,6 +116,7 @@ static_library("CodeGen") {
     "MachineOperand.cpp",
     "MachineOptimizationRemarkEmitter.cpp",
     "MachineOutliner.cpp",
+    "MachinePassManager.cpp",
     "MachinePipeliner.cpp",
     "MachinePostDominators.cpp",
     "MachineRegionInfo.cpp",

llvm/utils/gn/secondary/llvm/unittests/CodeGen/BUILD.gn

@@ -21,6 +21,7 @@ unittest("CodeGenTests") {
     "MachineInstrBundleIteratorTest.cpp",
     "MachineInstrTest.cpp",
     "MachineOperandTest.cpp",
+    "PassManagerTest.cpp",
     "ScalableVectorMVTsTest.cpp",
     "TargetOptionsTest.cpp",
     "TypeTraitsTest.cpp",