libsysprof: sort frames with timsort

These are largely pre-sorted, but not fully when you have merged data. This
uses timsort to speed that up a bit.

In particular, the comparison of various sorts break down to (for a
~32,000,000 record capture.

  g_array_sort_with_data() => 3.9 seconds
  qsort_r() = > 3.7 seconds
  gtk_tim_sort() => .79 seconds

src/libsysprof/meson.build

@@ -145,6 +145,7 @@ libsysprof_private_sources = [
   'sysprof-process-info.c',
   'sysprof-strings.c',
   'sysprof-symbol-cache.c',
+  'timsort/gtktimsort.c',
 ]
 
 if polkit_dep.found()