[gn build] Port 795b17d

Author: llvmgnsyncbot

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

@@ -13,6 +13,7 @@ static_library("OpenMP") {
   ]
   public_deps = [ "//llvm/include/llvm/Frontend/OpenMP:public_tablegen" ]
   sources = [
+    "DirectiveNameParser.cpp",
     "OMP.cpp",
     "OMPContext.cpp",
     "OMPIRBuilder.cpp",

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

@@ -19,6 +19,7 @@ unittest("LLVMFrontendTests") {
     "OpenMPCompositionTest.cpp",
     "OpenMPContextTest.cpp",
     "OpenMPDecompositionTest.cpp",
+    "OpenMPDirectiveNameParserTest.cpp",
     "OpenMPDirectiveNameTest.cpp",
     "OpenMPIRBuilderTest.cpp",
     "OpenMPParsingTest.cpp",