[gn build] Port 9ed2e68

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang/unittests/Format/BUILD.gn

@@ -25,6 +25,7 @@ unittest("FormatTests") {
     "FormatTestSelective.cpp",
     "FormatTestTableGen.cpp",
     "FormatTestTextProto.cpp",
+    "FormatTestVerilog.cpp",
     "MacroExpanderTest.cpp",
     "NamespaceEndCommentsFixerTest.cpp",
     "QualifierFixerTest.cpp",