spi_flash: mocking should be possible now

The following three headers will be mockes:
* esp_flash.h
* esp_spi_flash.h
* esp_partition.h
* counter functions live in own header
* add spi_flash sim dir for esp_err.h to Unity
* modified gen_esp_err_to_name.py to ignore
  sim/ dir in spi_flash component

Add cmock .yaml config file
Add spi hal header until soc can mock the hal
  layer as well.

components/spi_flash/include/esp_spi_flash_counters.h

@@ -0,0 +1,66 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// 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.
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "esp_err.h"
+#include "sdkconfig.h"
+
+#if CONFIG_SPI_FLASH_ENABLE_COUNTERS
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Structure holding statistics for one type of operation
+ */
+typedef struct {
+    uint32_t count;     // number of times operation was executed
+    uint32_t time;      // total time taken, in microseconds
+    uint32_t bytes;     // total number of bytes
+} spi_flash_counter_t;
+
+typedef struct {
+    spi_flash_counter_t read;
+    spi_flash_counter_t write;
+    spi_flash_counter_t erase;
+} spi_flash_counters_t;
+
+/**
+ * @brief  Reset SPI flash operation counters
+ */
+void spi_flash_reset_counters(void);
+
+/**
+ * @brief  Print SPI flash operation counters
+ */
+void spi_flash_dump_counters(void);
+
+/**
+ * @brief  Return current SPI flash operation counters
+ *
+ * @return  pointer to the spi_flash_counters_t structure holding values
+ *          of the operation counters
+ */
+const spi_flash_counters_t* spi_flash_get_counters(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //CONFIG_SPI_FLASH_ENABLE_COUNTERS
+