glocalfile: Support statvfs.f_type

This is another way to get the file system type from `statvfs()`, newly
added in glibc 2.39
(https://lwn.net/ml/libc-alpha/38790850.J2Yia2DhmK@pinacolada/).

This hasn’t been tested with glibc 2.39 as I don’t have it, but the
change seems fairly straightforward.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

gio/glocalfile.c

@@ -1089,6 +1089,8 @@ g_local_file_query_filesystem_info (GFile         *file,
   fstype = statfs_buffer.f_fstypename;
 #elif defined(HAVE_STRUCT_STATVFS_F_BASETYPE)
   fstype = statfs_buffer.f_basetype;
+#elif defined(HAVE_STRUCT_STATVFS_F_TYPE)
+  fstype = get_fs_type (statfs_buffer.f_type);
 #else
   fstype = NULL;
 #endif

meson.build

@@ -507,6 +507,7 @@ struct_members = [
                            #include <dirent.h>''' ],
   [ 'statvfs', 'f_basetype', '#include <sys/statvfs.h>' ],
   [ 'statvfs', 'f_fstypename', '#include <sys/statvfs.h>' ],
+  [ 'statvfs', 'f_type', '#include <sys/statvfs.h>' ],
   [ 'tm', 'tm_gmtoff', '#include <time.h>' ],
   [ 'tm', '__tm_gmtoff', '#include <time.h>' ],
 ]