perception: add gflags file

modules/perception/common/BUILD

+load("//tools:cpplint.bzl", "cpplint")
+
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "perception_gflags",
+    srcs = [
+        "perception_gflags.cc",
+    ],
+    hdrs = [
+        "perception_gflags.h",
+    ],
+    deps = [
+        "//external:gflags",
+    ],
+)
+
+cpplint()

modules/perception/common/perception_gflags.cc

+/******************************************************************************
+ * Copyright 2018 The Apollo Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *****************************************************************************/
+
+#include "modules/perception/common/perception_gflags.h"
+
+DEFINE_string(obs_sensor_intrinsic_path, "/home/caros/cybertron/params",
+              "The intrinsics/extrinsics dir.");
+
+DEFINE_string(obs_sensor_meta_path,
+              "./data/perception/modules/perception/common/sensor_meta.pt",
+              "The SensorManager config file.");

modules/perception/common/perception_gflags.h

+/******************************************************************************
+ * Copyright 2018 The Apollo Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *****************************************************************************/
+
+#ifndef MODULES_PERCEPTION_COMMON_PERCEPTION_GFLAGS_H_
+#define MODULES_PERCEPTION_COMMON_PERCEPTION_GFLAGS_H_
+
+#include "gflags/gflags.h"
+
+DECLARE_string(obs_sensor_intrinsic_pat);
+DECLARE_string(obs_sensor_meta_path);
+
+#endif  // MODULES_PERCEPTION_COMMON_PERCEPTION_GFLAGS_H_