Bug 1225778

Gcc 14 newly by default treats as errors a number of situations which
before were only warnings.  For more information see
https://gcc.gnu.org/gcc-14/porting_to.html and meta bug #1220571.

Because of this, package ibus fails to compile.  This can be seen online
at:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:Gcc7/ibus/standard/x86_64

It can be reproduced locally with command: osc build --clean
--alternative-project home:rguenther:nextgcc

Fedora seems to have decided to avoid the new errors, see
https://gitlab.com/fweimer-rh/fedora-modernc/-/blob/main/pkg/i/ibus.md?ref_type=heads
The issue seems to be related to vala, so we should probably consider using
-fpermissive - at least for now - too.

The error (that halts the build) is:

[  329s] emojierapp.c: In function ‘emoji_application_save_selected_string’:
[  329s] emojierapp.c:306:60: error: passing argument 3 of ‘g_settings_set_strv’ from incompatible pointer type [-Wincompatible-pointer-types]
[  329s]   306 |                 g_settings_set_strv (_tmp11_, "favorites", _tmp12_);
[  329s]       |                                                            ^~~~~~~
[  329s]       |                                                            |
[  329s]       |                                                            gchar ** {aka char **}
[  329s] In file included from /usr/include/glib-2.0/gio/gio.h:137,
[  329s]                  from /usr/include/gtk-3.0/gdk/gdkapplaunchcontext.h:28,
[  329s]                  from /usr/include/gtk-3.0/gdk/gdk.h:32,
[  329s]                  from /usr/include/gtk-3.0/gtk/gtk.h:30,
[  329s]                  from emojierapp.c:30:
[  329s] /usr/include/glib-2.0/gio/gsettings.h:191:94: note: expected ‘const gchar * const*’ {aka ‘const char * const*’} but argument is of type ‘gchar **’ {aka ‘char **’}
[  329s]   191 |                                                                          const gchar *const *value);
[  329s]       |                                                                          ~~~~~~~~~~~~~~~~~~~~^~~~~