glib.supp: More reachable suppressions for threads and thread pools

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

Fixes: #2132

glib.supp

@@ -913,6 +913,15 @@
 	fun:g_private_set_alloc0
 }
 
+# Keys for thread-private data
+{
+	g_private_key
+	Memcheck:Leak
+	match-leak-kinds:reachable
+	fun:malloc
+	fun:g_private_impl_new
+}
+
 # Thread-private GMainContext stack
 {
 	g_main_context_push_thread_default
@@ -975,3 +984,15 @@
 	...
 	fun:g_get_charset
 }
+
+# Global unused thread queue
+{
+	g_thread_pool_unused_thread_queue
+	Memcheck:Leak
+	match-leak-kinds:reachable
+	fun:malloc
+	...
+	fun:g_async_queue_new_full
+	...
+	fun:g_thread_pool_new
+}