contrib/plugins/execlog: Fix compiler warning

contrib/plugins/execlog: Fix compiler warning

1. The g_pattern_match_string() is deprecated when glib2 version >= 2.70.
   Use g_pattern_spec_match_string() instead to avoid this problem.

2. The type of second parameter in g_ptr_array_add() is
   'gpointer' {aka 'void *'}, but the type of reg->name is 'const char*'.
   Cast the type of reg->name to 'gpointer' to avoid this problem.

compiler warning message:

  contrib/plugins/execlog.c:330:17: warning: ‘g_pattern_match_string’
  is deprecated: Use 'g_pattern_spec_match_string' instead [-Wdeprecated-declarations]
    330 |                 if (g_pattern_match_string(pat, rd->name) ||
        |                 ^~
  In file included from /usr/include/glib-2.0/glib.h:67,
                   from contrib/plugins/execlog.c:9:
  /usr/include/glib-2.0/glib/gpattern.h:57:15: note: declared here
     57 | gboolean      g_pattern_match_string   (GPatternSpec *pspec,
        |               ^~~~~~~~~~~~~~~~~~~~~~
  contrib/plugins/execlog.c:331:21: warning: ‘g_pattern_match_string’
  is deprecated: Use 'g_pattern_spec_match_string' instead [-Wdeprecated-declarations]
    331 |                     g_pattern_match_string(pat, rd_lower)) {
        |                     ^~~~~~~~~~~~~~~~~~~~~~
  /usr/include/glib-2.0/glib/gpattern.h:57:15: note: declared here
     57 | gboolean      g_pattern_match_string   (GPatternSpec *pspec,
        |               ^~~~~~~~~~~~~~~~~~~~~~
  contrib/plugins/execlog.c:339:63: warning: passing argument 2 of
  ‘g_ptr_array_add’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
    339 |                             g_ptr_array_add(all_reg_names, reg->name);
        |                                                            ~~~^~~~~~
  In file included from /usr/include/glib-2.0/glib.h:33:
  /usr/include/glib-2.0/glib/garray.h:198:62: note: expected
  ‘gpointer’ {aka ‘void *’} but argument is of type ‘const char *’
    198 |                                            gpointer          data);
        |                                            ~~~~~~~~~~~~~~~~~~^~~~

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2210
Signed-off-by: Yao Xingtao <yaoxt.fnst@fujitsu.com>
Message-ID: <20240326015257.21516-1-yaoxt.fnst@fujitsu.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>