patch 9.1.0327: No support for using $XDG_CONFIG_HOME

Problem:  No support for using $XDG_CONFIG_HOME
Solution: optionally source $XDG_CONFIG_HOME/vim/vimrc
          (Luca Saccarola)

fixes: #2034
closes: #14182

Signed-off-by: Luca Saccarola <github.e41mv@aleeas.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 3a4b5f6..b41f5f4 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -331,6 +331,7 @@
 	test_wnext \
 	test_wordcount \
 	test_writefile \
+	test_xdg \
 	test_xxd \
 	test_alot_latin \
 	test_alot_utf8 \
@@ -564,6 +565,7 @@
 	test_winfixbuf.res \
 	test_wordcount.res \
 	test_writefile.res \
+	test_xdg.res \
 	test_xxd.res \
 	test_alot_latin.res \
 	test_alot_utf8.res \