HPCC-18574 Use --nostdinc when compiling with eclccserver

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>

ecl/eclccserver/eclccserver.cpp

@@ -331,6 +331,7 @@ class EclccCompileThread : implements IPooledThread, implements IErrorReporter,
         if (mainDefinition.length())
             eclccCmd.append(" -main ").append(mainDefinition);
         eclccCmd.append(" --timings");
+        eclccCmd.append(" --nostdinc");
         if (globals->getPropBool("@enableEclccDali", true))
         {
             const char *daliServers = globals->queryProp("@daliServers");