[gn build] Port 74ed334

Author: nico

llvm/utils/gn/secondary/llvm/lib/Frontend/HLSL/BUILD.gn

@@ -7,5 +7,6 @@ static_library("HLSL") {
   sources = [
     "CBuffer.cpp",
     "HLSLResource.cpp",
+    "HLSLRootSignature.cpp",
   ]
 }

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

@@ -3,6 +3,7 @@ import("//third-party/unittest/unittest.gni")
 unittest("LLVMFrontendTests") {
   deps = [
     "//llvm/lib/Analysis",
+    "//llvm/lib/Frontend/HLSL",
     "//llvm/lib/Frontend/OpenACC",
     "//llvm/lib/Frontend/OpenMP",
     "//llvm/lib/IR",
@@ -12,6 +13,7 @@ unittest("LLVMFrontendTests") {
     "//llvm/lib/Testing/Support",
   ]
   sources = [
+    "HLSLRootSignatureDumpTest.cpp",
     "OpenACCTest.cpp",
     "OpenMPCompositionTest.cpp",
     "OpenMPContextTest.cpp",