libsysprof-capture: Use stdbool instead of gboolean

Another step towards dropping GLib as a dependency of
libsysprof-capture.

Unlike the previous commit which replaced GLib integer types with the
bitwise equivalent C standard types, `stdbool` is potentially a different
width from `gboolean`, so this is an ABI break.

It therefore involves some changes to callback functions in the tests
and tools, and in libsysprof.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #40

src/libsysprof/sysprof-control-source.c

@@ -123,10 +123,10 @@ sysprof_control_source_init (SysprofControlSource *self)
   g_array_set_clear_func (self->source_ids, remove_source_id);
 }
 
-static gboolean
-event_frame_cb (gconstpointer  data,
-                gsize         *length,
-                gpointer       user_data)
+static bool
+event_frame_cb (const void *data,
+                size_t     *length,
+                void       *user_data)
 {
   const SysprofCaptureFrame *fr = data;
   RingData *rd = user_data;

src/libsysprof/sysprof-local-profiler.c

@@ -983,9 +983,9 @@ profiler_iface_init (SysprofProfilerInterface *iface)
   iface->stopped = sysprof_local_profiler_real_stopped;
 }
 
-static gboolean
+static bool
 find_profiler_meta_cb (const SysprofCaptureFrame *frame,
-                       gpointer                   user_data)
+                       void                      *user_data)
 {
   const SysprofCaptureMetadata *meta = (const SysprofCaptureMetadata *)frame;
   GKeyFile **keyfile = user_data;
@@ -1006,7 +1006,7 @@ find_profiler_meta_cb (const SysprofCaptureFrame *frame,
       return *keyfile == NULL;
     }
 
-  return TRUE;
+  return true;
 }
 
 SysprofProfiler *

src/libsysprof/sysprof-memprof-profile.c

@@ -251,9 +251,9 @@ create_cursor (SysprofCaptureReader *reader)
   return cursor;
 }
 
-static gboolean
+static bool
 all_allocs_foreach_cb (const SysprofCaptureFrame *frame,
-                       gpointer                   user_data)
+                       void                      *user_data)
 {
   Generate *g = user_data;
 
@@ -273,12 +273,12 @@ all_allocs_foreach_cb (const SysprofCaptureFrame *frame,
                                (gchar *)g_string_chunk_insert_const (g->symbols, cmdline));
         }
 
-      return TRUE;
+      return true;
     }
 
   /* Short-circuit if we don't care about this frame */
   if (!sysprof_selection_contains (g->selection, frame->time))
-    return TRUE;
+    return true;
 
   if (frame->type == SYSPROF_CAPTURE_FRAME_ALLOCATION)
     {
@@ -361,7 +361,7 @@ all_allocs_foreach_cb (const SysprofCaptureFrame *frame,
         }
     }
 
-  return TRUE;
+  return true;
 }
 
 static gint