[gn build] Port c74ba57e0bd9

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

diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/BUILD.gn
index 12366a3..afd7fb5 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/RISCV/BUILD.gn
@@ -116,7 +116,6 @@
     "RISCVDeadRegisterDefinitions.cpp",
     "RISCVExpandAtomicPseudoInsts.cpp",
     "RISCVExpandPseudoInsts.cpp",
-    "RISCVFoldMasks.cpp",
     "RISCVFrameLowering.cpp",
     "RISCVGatherScatterLowering.cpp",
     "RISCVISelDAGToDAG.cpp",
@@ -138,6 +137,7 @@
     "RISCVTargetMachine.cpp",
     "RISCVTargetObjectFile.cpp",
     "RISCVTargetTransformInfo.cpp",
+    "RISCVVectorPeephole.cpp",
   ]
 }