build: Upgrade valgrind suppression file

Use newer version of Python's .supp file.

prof.supp

@@ -5,7 +5,7 @@
 #
 # This file is a combination of our own rules and
 # * the glib2 suppressions file that usually can be found at /usr/share/glib-2.0/valgrind/glib.supp
-# * python suppressions file from http://svn.python.org/projects/python/trunk/Misc/valgrind-python.supp
+# * python suppressions file from https://github.com/python/cpython/blob/main/Misc/valgrind-python.supp
 #
 
 {
@@ -1557,6 +1557,10 @@
 	...
 	fun:xdg_mime_init
 }
+
+# Python Valgrind .supp start
+# taken from https://github.com/python/cpython/blob/main/Misc/valgrind-python.supp
+
 #
 # This is a valgrind suppression file that should be used when using valgrind.
 #
@@ -1654,6 +1658,49 @@
    fun:COMMENT_THIS_LINE_TO_DISABLE_LEAK_WARNING
 }
 
+#
+# Leaks: dlopen() called without dlclose()
+#
+
+{
+   dlopen() called without dlclose()
+   Memcheck:Leak
+   fun:malloc
+   fun:malloc
+   fun:strdup
+   fun:_dl_load_cache_lookup
+}
+{
+   dlopen() called without dlclose()
+   Memcheck:Leak
+   fun:malloc
+   fun:malloc
+   fun:strdup
+   fun:_dl_map_object
+}
+{
+   dlopen() called without dlclose()
+   Memcheck:Leak
+   fun:malloc
+   fun:*
+   fun:_dl_new_object
+}
+{
+   dlopen() called without dlclose()
+   Memcheck:Leak
+   fun:calloc
+   fun:*
+   fun:_dl_new_object
+}
+{
+   dlopen() called without dlclose()
+   Memcheck:Leak
+   fun:calloc
+   fun:*
+   fun:_dl_check_map_versions
+}
+
+
 #
 # Non-python specific leaks
 #
@@ -2048,6 +2095,10 @@
    fun:PyUnicode_FSConverter
 }
 
+# Python Valgrind .supp end
+
+
+
 # Actual GTK things
 {
   GtkWidgetClass action GPtrArray