[gn build] Manually port f7b3559

Author: aeubanks

llvm/utils/gn/secondary/clang/test/BUILD.gn

@@ -67,6 +67,7 @@ write_lit_config("lit_site_cfg") {
     "ENABLE_SHARED=0",
     "LLVM_EXTERNAL_LIT=",
     "LLVM_HOST_TRIPLE=$llvm_current_triple",
+    "LLVM_INCLUDE_SPIRV_TOOLS_TESTS=",
     "LLVM_LIT_TOOLS_DIR=",  # Intentionally empty, matches cmake build.
     "LLVM_TOOL_LLVM_DRIVER_BUILD=0",  # FIXME: Add actual support for this.
     "LLVM_USE_SANITIZER=",

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

@@ -2,6 +2,7 @@ static_library("Offloading") {
   output_name = "LLVMFrontendOffloading"
   deps = [
     "//llvm/lib/IR",
+    "//llvm/lib/ObjectYAML",
     "//llvm/lib/Support",
     "//llvm/lib/Transforms/Utils",
   ]