Explicitly state that --verbose and --quiet can be used at the same time (#5259)

Just a little clarification.

Author: samopolacek

cli/cmdlineparser.cpp

@@ -1286,6 +1286,7 @@ void CmdLineParser::printHelp()
         "                         the configuration cppcheck should check.\n"
         "                         For example: '--project-configuration=Release|Win32'\n"
         "    -q, --quiet          Do not show progress reports.\n"
+        "                         Note that this option is not mutually exclusive with --verbose.\n"
         "    -rp=<paths>, --relative-paths=<paths>\n"
         "                         Use relative paths in output. When given, <paths> are\n"
         "                         used as base. You can separate multiple paths by ';'.\n"
@@ -1370,6 +1371,7 @@ void CmdLineParser::printHelp()
     "                         hide certain #ifdef <ID> code paths from checking.\n"
     "                         Example: '-UDEBUG'\n"
     "    -v, --verbose        Output more detailed error information.\n"
+    "                         Note that this option is not mutually exclusive with --quiet.\n"
     "    --version            Print out version number.\n"
     "    --xml                Write results in xml format to error stream (stderr).\n"
     "\n"