gnu: pango: Update to 1.44.7.

* gnu/packages/patches/pango-skip-libthai-test.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/gtk.scm (pango): Update to 1.44.7.
[source](patches): New field.
[build-system]: Switch to MESON-BUILD-SYSTEM.
[arguments]: Disable tests that require the Cantarell font.
[inputs]: Move LIBXFT ...
[propagated-inputs]: ... here.
(pango-1.42): New public variable.
* gnu/packages/gnome.scm (librsvg)[inputs]: Change from PANGO to PANGO-1.42.

gnu/packages/patches/pango-skip-libthai-test.patch

@@ -0,0 +1,23 @@
+Skip Thai character test when libthai is unavailable.
+
+Taken from upstream bug tracker:
+https://gitlab.gnome.org/GNOME/pango/merge_requests/161
+https://gitlab.gnome.org/GNOME/pango/commit/b73284747ac937e31dc9191f84ed6e24284c88ee
+
+diff --git a/tests/test-break.c b/tests/test-break.c
+index 8549b678bba69360d07dce3af21d915412f20d51..47fa3009165e19a331aa04a0df4351ae2323933b 100644
+--- a/tests/test-break.c
++++ b/tests/test-break.c
+@@ -305,6 +305,12 @@ main (int argc, char *argv[])
+       if (!strstr (name, "break"))
+         continue;
+ 
++#ifndef HAVE_LIBTHAI
++      /* four.break involves Thai, so only test it when we have libthai */
++      if (strstr (name, "four.break"))
++        continue;
++#endif
++
+       path = g_strdup_printf ("/break/%s", name);
+       g_test_add_data_func_full (path, g_test_build_filename (G_TEST_DIST, "breaks", name, NULL),
+                                  test_break, g_free);