[gn] Port e19d740

Author: nico

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

@@ -83,7 +83,8 @@ write_lit_cfg("lit_api_site_cfg") {
     "LLVM_HOST_TRIPLE=$llvm_current_triple",
     "LLVM_INCLUDE_DIR=" + rebase_path("$root_out_dir/include"),
     "LLVM_USE_SANITIZER=",
-    "Lua_EXECUTABLE=",
+    "LUA_EXECUTABLE=",
+    "LLDB_LUA_CPATH=",
     "LLDB_FRAMEWORK_DIR=XXX_framework_dir",
     "CMAKE_CXX_COMPILER=c++",  # XXX use bin/clang++ instead?
     "HOST_OS=$host_os",  # XXX