patch 9.0.1574: MS-Windows: list of translation input files incomplete

Problem:    MS-Windows: list of translation input files incomplete.
Solution:   Move the list of files to a common file. (closes #12426)
diff --git a/src/po/Make_all.mak b/src/po/Make_all.mak
index 89cbb15..7a6144e 100644
--- a/src/po/Make_all.mak
+++ b/src/po/Make_all.mak
@@ -180,3 +180,11 @@
 		zh_TW.UTF-8.ck \
 		zh_TW.ck \
 
+PO_VIM_INPUTLIST = \
+	../../runtime/optwin.vim \
+	../../runtime/defaults.vim
+
+PO_VIM_JSLIST = \
+	optwin.js \
+	defaults.js
+