Update IDF to 65acd99 (#358)

* Update IDF to 65acd99

* Update platformio and arduino build paths and libs

* Update esptool binaries

tools/sdk/include/esp32/esp_clk.h

@@ -0,0 +1,44 @@
+// Copyright 2015-2017 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
+
+/**
+ * @file esp_clk.h
+ *
+ * This file contains declarations of clock related functions.
+ * These functions are used in ESP-IDF components, but should not be considered
+ * to be part of public API.
+ */
+
+/**
+ * @brief Initialize clock-related settings
+ *
+ * Called from cpu_start.c, not intended to be called from other places.
+ * This function configures the CPU clock, RTC slow and fast clocks, and
+ * performs RTC slow clock calibration.
+ */
+void esp_clk_init(void);
+
+
+/**
+ * @brief Get the cached calibration value of RTC slow clock
+ *
+ * The value is in the same format as returned by rtc_clk_cal (microseconds,
+ * in Q13.19 fixed-point format).
+ *
+ * @return the calibration value obtained using rtc_clk_cal, at startup time
+ */
+uint32_t esp_clk_slowclk_cal_get();
+