Restore C++98 compilation mode

Also, remove the line that required C++11 from UDPSocket.h

Author: bogdanm

libraries/net/lwip/Socket/UDPSocket.h

@@ -22,8 +22,6 @@
 #include "Socket/Socket.h"
 #include "Socket/Endpoint.h"
 
-#include <cstdint>
-
 /**
 UDP Socket
 */

workspace_tools/toolchains/gcc.py

@@ -62,7 +62,7 @@ def __init__(self, target, options=None, notify=None, tool_path=""):
         self.asm = [join(tool_path, "arm-none-eabi-as")] + self.cpu
 
         self.cc  = [join(tool_path, "arm-none-eabi-gcc"), "-std=gnu99"] + common_flags
-        self.cppc =[join(tool_path, "arm-none-eabi-g++"), "-std=gnu++11"] + common_flags
+        self.cppc =[join(tool_path, "arm-none-eabi-g++"), "-std=gnu++98"] + common_flags
 
         self.ld = [join(tool_path, "arm-none-eabi-gcc"), "-Wl,--gc-sections", "-Wl,--wrap,main"] + self.cpu
         self.sys_libs = ["stdc++", "supc++", "m", "c", "gcc"]