[gn build] Port 53aad35

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn

@@ -202,6 +202,7 @@ static_library("LLVMAMDGPUCodeGen") {
     "AMDGPUTargetMachine.cpp",
     "AMDGPUTargetObjectFile.cpp",
     "AMDGPUTargetTransformInfo.cpp",
+    "AMDGPUUniformIntrinsicCombine.cpp",
     "AMDGPUUnifyDivergentExitNodes.cpp",
     "AMDGPUWaitSGPRHazards.cpp",
     "GCNCreateVOPD.cpp",