Added SDK 2.1.0 to the build

Makefile

@@ -23,6 +23,8 @@ UNZIP = unzip -q -o
 VENDOR_SDK_ZIP = $(VENDOR_SDK_ZIP_$(VENDOR_SDK))
 VENDOR_SDK_DIR = $(VENDOR_SDK_DIR_$(VENDOR_SDK))
 
+VENDOR_SDK_ZIP_2.1.0 = ESP8266_NONOS_SDK-2.1.0.zip
+VENDOR_SDK_DIR_2.1.0 = ESP8266_NONOS_SDK-2.1.0
 VENDOR_SDK_ZIP_2.0.0 = ESP8266_NONOS_SDK_V2.0.0_16_08_10.zip
 VENDOR_SDK_DIR_2.0.0 = ESP8266_NONOS_SDK_V2.0.0_16_08_10
 VENDOR_SDK_ZIP_1.5.4 = ESP8266_NONOS_SDK_V1.5.4_16_05_20.zip
@@ -177,6 +179,10 @@ $(VENDOR_SDK_DIR)/.dir: $(VENDOR_SDK_ZIP)
 	-mv License $(VENDOR_SDK_DIR)
 	touch $@
 
+$(VENDOR_SDK_DIR_2.1.0)/.dir: $(VENDOR_SDK_ZIP_2.1.0)
+	$(UNZIP) $^
+	touch $@
+
 $(VENDOR_SDK_DIR_2.0.0)/.dir: $(VENDOR_SDK_ZIP_2.0.0)
 	$(UNZIP) $^
 	mv ESP8266_NONOS_SDK $(VENDOR_SDK_DIR_2.0.0)
@@ -191,6 +197,13 @@ $(VENDOR_SDK_DIR_1.5.4)/.dir: $(VENDOR_SDK_ZIP_1.5.4)
 
 sdk_patch: $(VENDOR_SDK_DIR)/.dir .sdk_patch_$(VENDOR_SDK)
 
+.sdk_patch_2.1.0: user_rf_cal_sector_set.o
+	echo -e "#undef ESP_SDK_VERSION\n#define ESP_SDK_VERSION 020100" >>$(VENDOR_SDK_DIR)/include/esp_sdk_ver.h
+	$(PATCH) -d $(VENDOR_SDK_DIR) -p1 < c_types-c99_sdk_2.patch
+	cd $(VENDOR_SDK_DIR)/lib; mkdir -p tmp; cd tmp; $(TOOLCHAIN)/bin/xtensa-lx106-elf-ar x ../libcrypto.a; cd ..; $(TOOLCHAIN)/bin/xtensa-lx106-elf-ar rs libwpa.a tmp/*.o
+	$(TOOLCHAIN)/bin/xtensa-lx106-elf-ar r $(VENDOR_SDK_DIR)/lib/libmain.a user_rf_cal_sector_set.o
+	@touch $@
+
 .sdk_patch_2.0.0: ESP8266_NONOS_SDK_V2.0.0_patch_16_08_09.zip user_rf_cal_sector_set.o
 	echo -e "#undef ESP_SDK_VERSION\n#define ESP_SDK_VERSION 020000" >>$(VENDOR_SDK_DIR)/include/esp_sdk_ver.h
 	$(UNZIP) ESP8266_NONOS_SDK_V2.0.0_patch_16_08_09.zip
@@ -344,6 +357,9 @@ ifeq ($(STANDALONE),y)
 	    $(TOOLCHAIN)/xtensa-lx106-elf/sysroot/usr/include/
 endif
 
+
+ESP8266_NONOS_SDK-2.1.0.zip:
+	wget --content-disposition "https://github.com/espressif/ESP8266_NONOS_SDK/archive/v2.1.0.zip"
 # The only change wrt to ESP8266_NONOS_SDK_V2.0.0_16_07_19.zip is licensing blurb in source/
 # header files. Libs are the same (and patch is required just the same).
 ESP8266_NONOS_SDK_V2.0.0_16_08_10.zip: