{
  "targets": [
    {
      "sources": [
        "ReQL-ast-Node.cpp",
        "ReQL-ast.c",
        "ReQL-expr-Node.cpp",
        "ReQL-expr.c"
        "ReQL-Node.cpp",
        "ReQL.c"
      ],
      "target_name": "libReQL"
    }
  ]
}

{
  "targets": [
    {
      "sources": [
        "ReQL-ast-Node.cpp",
        "ReQL-ast.c",
        "ReQL-expr-Node.cpp",
        "ReQL-expr.c",
        "ReQL-Node.cpp",
        "ReQL.c"
      ],
      "target_name": "libReQL"
    }
  ]
}

Add missing comma.