Include <cstdint> when compiling TinyWebSockets.

Fixes:

    In file included from external/TinyWebsockets/tiny_websockets_lib/include/tiny_websockets/network/linux/linux_tcp_client.hpp:6,
                     from external/TinyWebsockets/tiny_websockets_lib/include/tiny_websockets/internals/ws_common.hpp:37,
                     from external/TinyWebsockets/tiny_websockets_lib/include/tiny_websockets/internals/wscrypto/crypto.hpp:3,
                     from external/TinyWebsockets/tiny_websockets_lib/src/crypto.cpp:1:
    external/TinyWebsockets/tiny_websockets_lib/include/tiny_websockets/network/tcp_client.hpp:11:29: error: ‘uint8_t’ does not name a type
       11 |     virtual void send(const uint8_t* data, const uint32_t len) = 0;
          |                             ^~~~~~~
    external/TinyWebsockets/tiny_websockets_lib/include/tiny_websockets/network/tcp_client.hpp:5:1: note: ‘uint8_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’
        4 | #include <tiny_websockets/network/tcp_socket.hpp>
      +++ |+#include <cstdint>
        5 |

Makefile

@@ -1,7 +1,7 @@
 CXX=g++
 # -std=gnu++17
 VERSION=OSPI
-CXXFLAGS=-std=gnu++14 -D$(VERSION) -DSMTP_OPENSSL -Wall -include string.h -Iexternal/TinyWebsockets/tiny_websockets_lib/include -Iexternal/OpenThings-Framework-Firmware-Library/
+CXXFLAGS=-std=gnu++14 -D$(VERSION) -DSMTP_OPENSSL -Wall -include string.h -include cstdint -Iexternal/TinyWebsockets/tiny_websockets_lib/include -Iexternal/OpenThings-Framework-Firmware-Library/
 LD=$(CXX)
 LIBS=pthread mosquitto ssl crypto
 LDFLAGS=$(addprefix -l,$(LIBS))

build.sh

@@ -34,15 +34,15 @@ if [ "$1" == "demo" ]; then
 
     ws=$(ls external/TinyWebsockets/tiny_websockets_lib/src/*.cpp)
     otf=$(ls external/OpenThings-Framework-Firmware-Library/*.cpp)
-    g++ -o OpenSprinkler -DDEMO -DSMTP_OPENSSL $DEBUG -std=c++14 -include string.h main.cpp OpenSprinkler.cpp program.cpp opensprinkler_server.cpp utils.cpp weather.cpp gpio.cpp mqtt.cpp smtp.c -Iexternal/TinyWebsockets/tiny_websockets_lib/include $ws -Iexternal/OpenThings-Framework-Firmware-Library/ $otf -lpthread -lmosquitto -lssl -lcrypto
+    g++ -o OpenSprinkler -DDEMO -DSMTP_OPENSSL $DEBUG -std=c++14 -include string.h -include cstdint main.cpp OpenSprinkler.cpp program.cpp opensprinkler_server.cpp utils.cpp weather.cpp gpio.cpp mqtt.cpp smtp.c -Iexternal/TinyWebsockets/tiny_websockets_lib/include $ws -Iexternal/OpenThings-Framework-Firmware-Library/ $otf -lpthread -lmosquitto -lssl -lcrypto
 elif [ "$1" == "osbo" ]; then
 	echo "Installing required libraries..."
 	apt-get install -y libmosquitto-dev libssl-dev
 	echo "Compiling osbo firmware..."
 
     ws=$(ls external/TinyWebsockets/tiny_websockets_lib/src/*.cpp)
     otf=$(ls external/OpenThings-Framework-Firmware-Library/*.cpp)
-	g++ -o OpenSprinkler -DOSBO -DSMTP_OPENSSL $DEBUG -std=c++14 -include string.h main.cpp OpenSprinkler.cpp program.cpp opensprinkler_server.cpp utils.cpp weather.cpp gpio.cpp mqtt.cpp smtp.c -Iexternal/TinyWebsockets/tiny_websockets_lib/include $ws -Iexternal/OpenThings-Framework-Firmware-Library/ $otf -lpthread -lmosquitto -lssl -lcrypto
+	g++ -o OpenSprinkler -DOSBO -DSMTP_OPENSSL $DEBUG -std=c++14 -include string.h -include cstdint main.cpp OpenSprinkler.cpp program.cpp opensprinkler_server.cpp utils.cpp weather.cpp gpio.cpp mqtt.cpp smtp.c -Iexternal/TinyWebsockets/tiny_websockets_lib/include $ws -Iexternal/OpenThings-Framework-Firmware-Library/ $otf -lpthread -lmosquitto -lssl -lcrypto
 else
 	echo "Installing required libraries..."
 	apt-get update
@@ -66,7 +66,7 @@ else
 	echo "Compiling ospi firmware..."
     ws=$(ls external/TinyWebsockets/tiny_websockets_lib/src/*.cpp)
     otf=$(ls external/OpenThings-Framework-Firmware-Library/*.cpp)
-	g++ -o OpenSprinkler -DOSPI $USEGPIO -DSMTP_OPENSSL $DEBUG -std=c++14 -include string.h main.cpp OpenSprinkler.cpp program.cpp opensprinkler_server.cpp utils.cpp weather.cpp gpio.cpp mqtt.cpp smtp.c -Iexternal/TinyWebsockets/tiny_websockets_lib/include $ws -Iexternal/OpenThings-Framework-Firmware-Library/ $otf -lpthread -lmosquitto -lssl -lcrypto $GPIOLIB
+	g++ -o OpenSprinkler -DOSPI $USEGPIO -DSMTP_OPENSSL $DEBUG -std=c++14 -include string.h -include cstdint main.cpp OpenSprinkler.cpp program.cpp opensprinkler_server.cpp utils.cpp weather.cpp gpio.cpp mqtt.cpp smtp.c -Iexternal/TinyWebsockets/tiny_websockets_lib/include $ws -Iexternal/OpenThings-Framework-Firmware-Library/ $otf -lpthread -lmosquitto -lssl -lcrypto $GPIOLIB
 fi
 
 if [ -f /etc/init.d/OpenSprinkler.sh ]; then