gobject-introspection: Update to 1.58.0; add new python-markdown dependency (#4348)

mingw-w64-python-markdown/python2-markdown-i686.install

@@ -0,0 +1,14 @@
+post_install() {
+  cd mingw32
+  local _prefix=$(pwd -W)
+  cd -
+  local _it
+  for _it in markdown_py2; do
+    sed -e "s|/mingw32|${_prefix}|g" \
+        -i mingw32/bin/${_it}-script.py
+  done
+}
+
+post_upgrade() {
+  post_install
+}