libsysprof-capture: Use C11 types instead of GLib types

This is an almost entirely mechanical* conversion from (for example)
`gint` → `int`, `guint8` → `uint8_t`, etc.

It is not entirely complete, as many GLib functions are still used in
libsysprof-capture, which necessitate some use of GLib types.

It also avoids renaming `gboolean` → `bool` as that’s a slightly more
controversial change which will happen in the following commit.

*Code was manually realigned afterwards.

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

Helps: #40

src/libsysprof-capture/sysprof-address.c

@@ -105,7 +105,7 @@ sysprof_address_is_context_switch (SysprofAddress         address,
     }
 }
 
-const gchar *
+const char *
 sysprof_address_context_to_string (SysprofAddressContext context)
 {
   switch (context)