[gn] fix bug in bfba621

Author: nico

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

@@ -67,15 +67,14 @@ write_lit_config("lit_site_cfg") {
     "ENABLE_SHARED=0",
     "LLVM_EXTERNAL_LIT=",
     "LLVM_HOST_TRIPLE=$llvm_current_triple",
-    "LLVM_INCLUDE_SPIRV_TOOLS_TESTS=",
+    "LLVM_INCLUDE_SPIRV_TOOLS_TESTS=0",
     "LLVM_LIT_TOOLS_DIR=",  # Intentionally empty, matches cmake build.
     "LLVM_TOOL_LLVM_DRIVER_BUILD=0",  # FIXME: Add actual support for this.
     "LLVM_USE_SANITIZER=",
     "LLVM_VERSION_MAJOR=$llvm_version_major",
     "Python3_EXECUTABLE=$python_path",
     "USE_Z3_SOLVER=",
     "PPC_LINUX_DEFAULT_IEEELONGDOUBLE=0",
-    "LLVM_INCLUDE_SPIRV_TOOLS_TESTS=0",
   ]
 
   if (clang_enable_static_analyzer) {